Ken, I have a generic answer for you.

1. Stepped attenuator - As far as I am aware, there would be no difference in sound, it is mostly about the stepped attenuator option.
2. Type II Beeswax - This replaces the only capacitor in the signal path  with a higher quality capacitor, i.e. better sound.
3. Beeswax Bypass Mod - This does the same as #2 but in the power supply circuit. This also equates to better sound.

Art

I think ArtMan did a great job explaining the options.  I'd just add, that I've read a few times around these forums that people recommend just getting the base model first, and in the future, you can always send it back to Decware to have mods done, if you desire - especially if money is tight.  

I also swear I read somewhere that Steve thinks if you can only do one of the capacitor mods, go for the Bypass Mod first, because the performance improvement is greater with that mod, than with the  Beeswax mod (or whatever capacitor upgrade you choose)

I just tried looking quick for both threads, but couldn't find them.  Definitely spend some time reading on these forums, though, and you'll probably come across them!  Good luck, and let us all know what you buy!

Who is this Steve guy?  Can I trust him?  Does he know what he is talking about?

Thanks for that link.  I guess what I really needed was your help defining what they actually were (for the two Beeswax mods...what parts they impacted).  Makes way more sense now.

This amp is more of a 'fun' thing to play with.  I have my main system, but also just built (well, assembled) the Fostex BK-12m kit from Madisound and those things are ROCKING with just a watt, so figured this would be fun.  I also have some larger tower speakers (running with a bigger tube amp or SS amp depending on my mood and how hot the weather is) that might not be the best match for this, but will be fun to try.

Thanks!

EDIT - and thanks for the video link.  It was from the 'other' Steve where I learned about this amp and this company.