Speakers are PSB Stratus Silveri's Front L/R (rated to 35Hz), Stratus C6i Center (rated to 55Hz) and Athena AS-B1's as surrounds (don't expect much base out of em). No sub, had a nice Velodyne 15", but had to move to an apartment, hardwood floors, not a sub-friendly environment. Running a NAD-763 receiver. Main question is this: What do you think would be the best size settings for this set-up. I absolutely love the the sound of these speakers. Just got the center and receiver, and it's just beautiful. The thing is, I'm not sure what my ideal set-up is for really good over-all sound. Currently have the three up front set to large, surrounds to small. Bass is fine, but with the center, it seems I've really lost the imaging I was enjoying with just two fronts. Just hoping for some ideas to try. Thanks much!