I know that the Pass 250.8 would probably musically be the finest of the bunch. It's reputation is that powerful. Again, the heat, size, and the fact I'd have to buy used (probably no returns) are negatives I have to consider. The reason I picked on the 4B3 is because I can actually audition it at home, it's at the extreme of my price range (new), and Bryston's build quality is bulletproof. I live about 2 hours north of Audio Advisor, so I could order the 4B3 one day and have it the next. They're also super with returns. If I can find a used amp for $6K or less that has a reputation for singing with the angels and built to last, I'd consider that as well. I received a personal e-mail that brought Simaudio into the discussion. I have limited experience with their products, but was really, really, really, impressed. I'd have no problem with one of their finer two channel amps (used).