Any Bryston 4B3 amp owners out there?

I would say the Parasound A21, Pass Labs X250.8, and Bryston 4B3 will sound different from each other and it will break down to your personal preference. Meaning you would benefit from hearing them in person if at all possible.

In my opinion, the overall sound character of the Pass Labs is closer to the Parasound than the Bryston is to the Parasound.

I recently picked up a 4B3 and find there is nothing it is lacking it's sound. Previous amp was a Classe CA-201 that I liked but the Bryston just sounds all around better IMHO. Rest of system is Canton Vento 890.2 DC,  BP25 pre and Teac PD H600 cdp.

You have a nice system there and I recommend you demo a 4b3  if you can. 

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).

For a few years I used 3B and 4B SST’s on two pairs of new Quads, for casual listening, and AtmaSpheres for careful listening. The Bryston sound was good, the build bulletproof.

Ancient history, I know, but might help a little.

Why not call the factory? I did, and the president himself gave me nearly an hour.

Thanks terry9. I've gotten tremendous feedback on this thread and another that I started about my Parasound A21. I'm stuck in the mud right now with my decision on which way to go with an amp. I have four strong contenders. Three I'd have to buy used, the 4B3 I could buy new. I like the idea of new because of no hassle returns/auditions and warranties that don't have transfer concerns. With the 4B3, nobody has talked me into it or out of it. It's like buying a new Ford truck with the simple belief that it will get the job done (I'm a happy Ford owner). I'll take a few weeks to digest and research what's been offered through everyone's kindness and experience. After that, it's probably a 50/50 chance that I'll end up with the Bryston. "Getting the job done" may be the best to keep me from driving myself nuts.