I think I caught the upgraditis bug that's going around on AVS because I'm looking at the Sierra-1's after just recently purchasing the CMB-170 SE's.

I have a few questions for you guys and I'd appreciate your input.
Originally I had planned on getting the CBM-170 SE's, CMT-340 SE Center, and a ~$500 subwoofer. Now I'm considering LCR Sierra-1's and a ~$500 subwoofer. The setup will be for all around use - movies, video games, and music. While I may be focused on one (or two) of the three at any given time I still want all of them to sound really good.
My room is small at only 11'x11'x8' and I don't listen at very loud volumes. I will be using a Denon AVR-1712 which has 90 WPC.
Based on what I've read about the Sierra-1's I'm expecting music to sound better compared to the CBM-170 SE's. What I want to know is if I would be losing anything with movies and games with the LCR Sierra-1's, particularly in regards to the center (CMT-340 SE vs Sierra-1), taking into account my small room. Would the Sierra-1 setup be a step up in all regards for movies, games, music? Does the CMT-340 SE Center match well with the Sierra-1's or would I be better off with the Sierra-1 center?
If I go with the Sierra-1's I will most likely choose B-stock. What has been your experience with B-stock?
Thanks
Edited by p3Orion - 1/25/13 at 9:20am