Plinius SA301 Or Bryston 4bsst2?

The Ayre V-5, of course. It's not quite as powerful as the 4, but the SQ is in another league. That said, I wouldn't pair it with a Thiel without an audition. Its a more detailed amp and paired with all those metal drivers Thiel uses may be a bit too much. But its so good, you may want to upgrade your speakers.

I heard the V-5 on Maggies 1.7 last year at a dealer, not saying it was the amp, but it was horribly shrill.
Do they take a long warm up?

It wasn't the amp so much as it was a poor combo. The V-5 didn't sound good on my 1.7's either. It won't hide the flaws of other components.

The warm up is quick. When you turn the V-5 off, it goes into a standby mode that keeps the amp partiality warmed up.

Thanks, Zd, I was thinking that myself .

Not that this is much help, but I successfully paired my 2.4s with a Pass XA-30.5 (and INT-30A). Those amps play up the imaging/soundstaging strengths of the Thiels and are nicely warm and textured, so you don't get burned with any brightness. Also, I never clipped the amp or felt like it ran out of steam, despite the low power rating.