IME there are very few integrated amps that are really ideal for most Thiel’s.
I'm getting superb results with my Ayre AX-5. On one hand, it is the only amp I've heard with the CS2.4SE. But on the other, I'm getting most of the SQ of the very best systems I've heard, eg, ARC Ref 250 driving Vandersteen Seven and Ayre R-series driving TAD Ref Ones. There are only a few systems I've heard that I would swap for mine straight across and all of them are considerably more $$$.