Lon,  I think you could really get to enjoy headphone listening.  When I wanted to get back into Hi Fi again, I read all that Steve wrote about the Taboo MK III.  The idea of getting great sound without the bother of speaker setup or room treatment appealed to me.  So I made my first Decware purchase, the Taboo MK III.  Long before it arrived I purchased a pair of Audeze LCD 2 headphones and listened with some old equipment I had. I also later bought a pair of Sennheiser HD 800.  You wouldn't like those...too bright but you would really like the Audeze Headphones...nice and warm, very forgiving of poor recordings.  I think you should look into them.  I haven't heard the LCD 3s or all the models Audeze subsequently has released.  I think mine were about a $1000 direct from Audeze.  I have to run but consider them before you decide.  I love them although I now prefer speaker listening as you do.  Mark.

Lon,
Another pair of headphones to consider are the Fostex T50RP ortho headphones. There are a few companies that modify them to the next level. I have a modified pair that I think are better than the LCD-2s. The downside is the pair I have was modified by a person that does not do the work anymore.
Besides that if the Oppo are 32 ohm you need to get the Taboo MKIII to have them come alive. The CSP2+ is great for higher ohm headphones, I think it is 300-600 ohm. The Taboo is for lower ohm headphones and also is available with different connector and output options. I have the option with two phono jacks and two 4 pin XLR jacks.
I think Steve mentioned the ultimate setup would be the CSP2+ in front of the Taboo.
The Taboo is a great headphone amp, I listen to mine about 6+ hours each day at work.
John

I decided to order the Oppo PM-1s. I wanted to try a planar magnetic, and the recommendation from my bud meant a lot to me, he's been through a lot of 'phones and stopped there.

The Audeze seem to be the ones that are most competitive and I fond this review from someone who I seem to agree with on things audio to be helpful:'

As far as the PM-1 vis a vis the LCD-2, I sold my LCD-2 after I received the production PM-1. Really, I liked every aspect about the PM-1's sound better. The LCD-2 had a very open sound, with a wide and deep soundstage similar to the PM-1, but with a "grittier" midrange . I enjoyed the PM-1's smoothness. It did everything that the LCD-2 did "right," but in a more relaxed, more forgiving fashion. Plus, the imaging through the PM-1 presented a sound field which was localized just right behind the back of my eyeballs, while music emanated from the LCD-2 square in the middle of my head, between my ears. A subtle difference, but one that I enjoyed more.

So I decided to go for them where I have 60 days to review.  I ordered the PM-1s. Will probably have them early next week.

Good to hear Lon. I hope you will keep us informed as they work in.

Thanks,

Will

More than one hundred hours on these now and they are a different headphone than when they first arrived--in good ways.

Nicely dynamic, a very comfortable tonal balance, detailed but not analytical. These are fun to listen to. I'll be keeping them.

The CSP2+ drives them quite well. There's plenty of more clicks on the volume but I'll never go higher than where I am, and I have the output only at about half way on those controls. They seem basically neutral and natural and revealing. Interestingly most reviews seem to agree, with a small amount of reviews saying they are harsh and thin, and another small number of reviews saying they are thick and slow and the highs are recessed! I think that means they are revealing the nature of the reviewers' systems quite adequately, and most are neutral.

What puzzles me is that I get this great tonal balance with no tonal controls applied via the headphones, but I have to scale back the treble on my HR-1s (and before that my ERRs and my RL-1s and RL-2s). No matter which of the rooms I've had the Decware components in, no matter what cabling, rack, conditioning. I had thought it was my hearing and I guess it could be but why then are the headphones not giving me a similar tonal signature? Just don't know! I've worked at it and gotten it all just as I need it (and will do so again in a few months in a new place) but it puzzles me. I've tried in past rooms reinforcing the mid and/or lower frequencies, but I still can't take the treble unrestricted. I can't do room tuning or treatment in any way other than with rugs and household furniture. It's been a journey, I have accomplished my goal, but I still don't understand the causes. My hearing measures well, and an audiologist suggested a sort of tinnitus which high frequencies aggravate, but why wouldn't that be so with headphones? A mystery. None-the-less, I'm really enjoying the headphones. Now I need to get that other CSP2+ up to snuff and perhaps add beeswax caps. . . And then I'll probably be selling bits and pieces of two whole systems. Weird situation but I'm an adaptable fellow and I'm pretty sure I'll enjoy my new headphone system in my next home. It will probably be these Oppos driven by a CSP2+ and a PWT/PWD Mark 2 combo serving as digital front end and a Power Plant Premier sparking it all up. Should sound really good.

Well maybe, thanks. I chose wisely I guess.

Still, they don't look that attenuated in the high frequencies as would cause the big difference between the sound via headphones and over speakers in my system.

Mark,
I have not heard the Oppos but looking at the graphs the Oppos seem to have a better balance. They are pretty much flat until the 10k where they nicely drop off. The Audeze seem flatter at the beginning but then start to go crazy after the 1K mark. I could see the Oppos being a little brighter on top because they don't have that weird blip at the 12k mark where after that they drop off 7 db. My guess would be that the Oppo would sound better on vocals and higher frequency instruments. The only way to really tell is to listen to both of them on the same amp and music.

D,  here's a graph of the HD 800s I have.  They are definitely much brighter than the Audeze.  Mark.

Mark,
From the graph it would seem the HD800 would be brighter than the Audeze. Well not brighter but closer to neutral. The graph for the Audeze really does not look that good at higher frequencies.

Lon,
It might be the ribbon tweeter that Decware uses. That thing is flat up to 20k with a little rise at 20k.

Just want to say these headphones are da bomb. Sound great, nicely smooth, immersive.

I'll probably not be attending a DecFest anytime soon. But yeah, they are excellent headphones. Granted, I don't have a lot of experience with headphones this century but I know what I like and these suit me and my source material and the rest of my system to a T.