I've got the Bastanis Prometheus speakers and they're driven by a modded Clari-T amp (BG's & stepped attenuators) and Vinnie-implemented Scott Nixon NOS battery dac. The combo is incredible IMO, and more enjoyable to listen to than basically anything else I've heard. Think of the Prometheus as a $10k+ speaker hiding in a $2.4k kit, and the Red Wine amp & source as the yin to that yang... transparency, detail, resolution and clarity are there like you probably haven't heard in any other system and it's enough to make you cry the first time you hear it (literally). On top of that they image like the best mini-monitors yet have bass way down somewhere into the low 30's. Hearing your music come from a system without traditional crossovers or ported boxes and without the grunge caused by a/c power is a very eye-opening experience and it's made me not even want to listen to anything else. Of course, it is a very different kind of sound than what audiophiles usually strive for, and I can certainly imagine someone preferring what tubes add to the mix.
Gary
p.s. Where are you located? If you're anywhere near Rochester, NY you're more than welcome to stop by and listen