HT and 2-channel music setup - New Ideas?

I have a Thiel CS2.4 as main front speakers, CS1.6 rear surround speakers, MCS1 as center and SS1 as subwoofer. Thinking of using Pass Labs X5 as amplifier. I have the following options for pre amp:
Bryston SP1.7
Simaudio Stargate
EAD Threatermaster 8800pro
I am into serious HT and 2-channel music. Any experience with the above?
Regards
Ken