I have a 5007 with 9.2. My LCR def tech mythos 8, my 6 surrounds are BP2X, 3 CSS SDX 15" subs crossed at 80hz. The sound is amazing the extra 2 speakers are on the ceiling 16' up. It is unbelievable to hear the extra sound, for example helicopters are actually above you. I know there is a lot...