As a long-time Thiel owner, I have found that the Thiels sound really sweet with high quality tube amps, particularly if you listen to a lot of classical music (which I do). I have auditioned, but do not currently own, the CS3.7 with both solid state and tube amps, and the tubes produce the more natural sound IMHO. Solid state electronics produce a more "etched" sound with almost holographic imaging, which can be impressive, but live music does not sound like that in my experience.
VTL and ARC are good choices but others may work well, too. I don't care for E.A.R, which I find to be very dark sounding. Just be sure the amp is good at driving low impedances because the Thiels are not particularly easy loads to drive.
VTL and ARC are good choices but others may work well, too. I don't care for E.A.R, which I find to be very dark sounding. Just be sure the amp is good at driving low impedances because the Thiels are not particularly easy loads to drive.