PSB vs Thiel 2.2/3.6 -- Any thoughts?

I currently own the PSB T55 (about 1200 MSRP if I recall) and am considering a switch to Thiel (2.2 or 3.6). Should I expect a significant improvement in sound? Bryston 3B-ST amp. Newbie to this forum. Any comments from you all will be most appreciated.