I am happy with the sound of the DT center. I've never personally experienced the "timbre matching" issue that is oft tossed around. I've also used the DT center when I was using Dahlquist DQ20i mains. It blended in perfectly there too.

If you are going to use balanced interconnects then the 1095 might be an OK amp. If not, I'd use the 1077. As for the 7500, people have been complaining about it in the forums a bit. The common thread seems to be hum and ground loop issues. You might want to check out the 7500/7700 forum before making that buying decision. It could be nothing...or it could be a sign of a real problem.

Good luck!