Plinius SA301 Or Bryston 4bsst2?

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.

My INT-30A just sold for $3450 (before my previous post). I think that's a killer deal (and am still a bit bitter about it). Some pretty reasonable prices on the X.5 and XA.5 these days because of the new .8 series.