I'm glad you guys like it. The center channel is custom built into the fireplace. and you guys are right there is a lot of marble and hard surfaces in my room. My 7075 works great. Plenty of power in my large room 14x24x10 with opening on one side 14x11. In terms of adding that acousic treatment for my corner sub (I also have the 2 built in 8 in sub in the mains) if i just bought 1 or 2 of those ATS Treatments you recommend and either hang them in the corner over the 10in sub or just sit them on the sub itself will the difference in the quality of bass be that dramatic? How does acoustical treatment effect the sound in laymans terms? i don't want to hang anything from my ceiling. and i can't move the sub out of the corner because of multiple reasons. any other suggestions or thoughts?