Tube Amplifier for Thiel

As others have noted, you need current with the Thiels. Medium sized SS or tube amps are not going to cut it.

There are 3 options;

1. buy the big CJ or VTL tube amps, but that will run you some coin.
2. buy a big SS amp, not as good as the tubes, but wont cost as much.
3. Buy a small tube amp you like that has the sonic characteristics, and feed its output into a pair of the Musical Fidelity Super Charger amps.

CJ PV-12 + CJ EV2000 + CS3.6

I would offer 1600 on that CJ Evolution 2000 listing which expires April 13th.

I 2nd Jafant's recommendation for CJ.

I 2nd Usound's suggestion of using the long wall and the importance placed on a low impedance capable amp.

I 2nd Jdolgin's recommendation for pairing the 3.6s with a warm sounding preamp. 3.6s are bright and the PV-12 mitigates that. And use RCA Cleartops.

I 2nd Salectric statement about tubes having a bigger effect in the amp section than the preamp section. Unfortunately such an amp is prohibitively expensive for speakers as hungry as yours.

You are on the right track with tube-pre and ss-amp. The EV2000 is really a SS beast with some tube accoutrements. It's rated at 200wpc and idles at 210w (measured with a kilowatt). If you are drawing 300w at the wall than you are already above most people's comfort zone. If the music has heavy bass, the same volume will draw between 400w and 450w. The most I've pulled from the EV2000 was between 600w and 700w. You will have tinnitus before this amps fails.

I think you (like I) place high value on bass energy so the tube integrated amp is not really a candidate. For fun I tried my friend's 60wpc LA Audio amp and it bested my EV2000 in many ways, though it did not deliver the high energy nor the depth I get from the EV2000. When pushed the LA Audio's bass rolled off gracefully and it's treble clipped ungracefully. I would bet for many audiophiles the 60wpc tube amp would remain a fine match for the CS3.6s, so long as they stick to their vocals, classical, and jazz. Those listeners would actually be fine with expensive bookshelf speakers like Harbeth or B&W.

I run a Manley Steelhead ( with Skipjack for multiple line level inputs) into NEO 250s for my CS6s and they are as dynamic and extended as when I powered them with a Krell KCT pre and a 400cx amp. The imaging is far better though with the tubes.

I have Thiel CS6's.  I don't use them often, preferring B&W 801S3 but when the 6's are used they are with VTL 450 MKII amps.  Like Stevecham I was using Krell then switched to tubes.  Big changes, the bass became less pronounced, still very good just not that Krell Slam and the mid and high frequencies warmed up nicely.