Jon, I accept your perspective. The doubling itself is less important than is having the required power at 2 ohms. So, the most important factor is how well the amp performs at 2 ohms, which is the critical impedance of Thiel designs.
That said, there are some matters of subtlety. When an amp is depleting its powersupply and therefore recharging capacitors in real musical time, the signal waveforms lose their integrity. Much of that "wow" factor that thrills Thiel owners comes from that very wavefront integrity.
Ron, that PS amp is highly likely to do what you need.
TM, I don't have such a list, being out of the loop for a long time. The amps that Jim used all did it. Big Krell, Levinson, I don't remember what else. The amp I use is a pair of Classé DR9s at Stereo: 100, 200, 400 and Mono: 400, 800 and 1200 watts per channel. I notice real improvement from one amp to two, and the one amp has 400 wpc into 2 ohms. My room is not huge and I listen at moderate levels. My main point is that many of the criticisms leveled at Thiel speakers are attributable to inadequate power and/or cable interactions. In manufacturing circles it is impolite to call out such perspectives. But, source signal integrity is a huge part of the picture.
I'll also note that global negative feedback messes with phase integrity. One reason Ayre products sound so good on Thiel is that they both maintain phase integrity to a high degree.
I would enjoy seeing the amp list that you guys might put together.
