Ok spoke with the gentleman today... it is a DK VS-1 Ref. Mk II...
I have heard his system with just his Esoteric DV-50 and both VPI super scoutmaster going into the DK alone... speakers were Usher Dancer 8871's. It was alright. It wasn't BAD, it wasn't GREAT. He liked it.
Since then, I have heard same system with the Aesthetix Callypso (I think) preamp. He confirmed tonight he is running the Aesthetix via balanced cable into the balance inputs on the DK. (So technically, I guess this would be going through two preamp sections???)... he swears it sounds MUCH better this way. When I heard it this way, not to my knowledge it was going through an input, I would have to agree - it did sound much better.
Did I do an A/B comparison? no. Was it weeks in between? Yep. Am I can expert? nope. Am I sure it sounded much better with teh Aesthetix? Yeah, it was not close.
Audioaril, you ask if I think Boulder equipment is better? I have no idea. Never owned one, never heard one. What I have seen is thread after thread on how the DK integrateds beat integrateds by known respectable manufacturers that retail for 3-8 times the cost (doesn't necessarily make them better) and these members swear the DK "kills" it.
I don't think so. Most of these members, like yourself explain no other parts of your system, and just expect us to believe the DK will just totally "blow away" a decent performer.
You may be selling to peeps here, but I for one, am not buying.