Can I get some Love for Thiel CS 2.2s?

I had the 2.2's for a year or so and powered them with a McCormack DNA-0.5 Deluxe. I thought it was a great combination, the Thiels definitely need an amp with some reserve power to take advantage of how dynamic they can be.

Audiofowl
I replaced them with ProAc Studio 150's and a subwoofer. I needed speakers that dominated the space a little less, both sonically and physically.

I don't know if I can answer precisely enough to be of any help but from my experience the ProAcs had a more well-defined placement of the instruments and voices so that the sound stage seemed more realistic and deeper, more three-dimensional.

The ProAcs are legendary for their mid-range and that has been true for me for both pair of ProAcs I've owned. That's especially noticeable with vocals. The Thiel's are certainly more of a full-range speaker and more true to the sonic texture of larger-scale music.

They're both very good speaker brands, though very different from each other. Ultimately, the reason I chose the ProAcs over the Thiels is that I was able to more easily forget about the speakers and just hear the music but I did sometimes miss the excitement of the Thiels.