Its been about 4 or 5 years it seems since I sold my Zen mono's and of course it wasn't because they din't sound good.   I have been running through all kinds of amps.   Music Reference,,  Quicksliver,  custom built 2a3, and others.       Currently I have a Scott 7591 refurbed 208 and a Luxman M-02 s/s on the sidelines and a NAD integrated in the bedroom.   What has now taken center stage is a 3 month old Taboo that I picked up on Audiogon... And the person that bought it originally from Steve really should have gotten higher efficiency speakers but then I would not have had the opportunity to buy the best sounding amp I have ever heard to date.      ;D     Steve has certainly put all his years of experience into making this one incredible amp.  Love that over sized power tranny and that internal construction and the parts compliment AND  8-)  that white deck with the black case.  
Tube compliment at the moment:  

BENDIX  NOS  military   "missile tube"  6106  rectifier-- cost non factor.    (someone may correct me if I am mistaken as I could have mixed up my tube lore trivia.)  

signal tube .. GE 5751  5 star *****  
pair of Siemens no label  el84's
Sweet indeed,, damn,, Im not kidding    :-*  

running now with Klipsch Fortes ii's w/Crites upgraded tweeter and I need to upgrade the crossover with the caps I got from him.  
I havnt even hooked the Taboo up to my MG 944's which are in the bedroom calling out for a union with the sweet heart in the front room.  
I havnt even played vinyl yet that's how good this amp sounds  with only fm.   I do have a very  optimized tuner situation w/rooftop antenna,,etc. so I am getting a signal that is worthy of this amp.   And I am very lucky to be here in the bay area with some of the best fm in the country.  And with CD's  even better.  Whats gonna happen when I play vinyl?    ::)

Mine took over my office. I have my new TABOO in there with bookshelf speakers right in front of me. Using the 6P15P-EV tubes and the grid modification, you can really tell the difference. Mine has V-caps and dual variable inputs for 2 sources. Bye bye cheap Radio Shack switching box. I have had it since late last year and it just keeps getting better as that transformer mellows and sweetens over time.

As far as I know V-Caps are an option on several amps, but not "standard." I have no experience with V-Caps. They have been praised to near-high heaven.

Here's a better one where the V-caps are easier to see:

BTW, if for any reason, Steve and the team don't want these pics posted, I can take them down.