Hello Jaxx.
I also recently upgraded to PSB 6T's for the front and 3LR's for the rears. I like the sound-- I think it is cleaner throughout the range than my old speakers (PSB Centuries).
I did have the fronts bi-wired and they sound great-- but I didn't do a head-to-head against standard wiring to see if I could hear the difference.
Unfortunately my 3 yr old PSB SubSonic subwoofer just died-- no more amp no workee. Bummer. I don't have the funds to buy a new subwoofer, and it is out of warranty. Not a great situation...
-HTLearner