Oh one last thing, there's also a sharp drop off with the speakers/setup which starts at 5000Hz and at 12500 Hz there's just about nothing. Now I'll admit over 16K isn't all that necessary for myself but...
I hear ya about the 4 speaker thing, it's a process.
I really had limited controll over the sub with the rear speakers on, unless I sent more to the back than the front, Where the stage (and instuments) are supposed to be. It sounded fine, but like I was facing away from the performance.
What are you thoughts about kicker panel enclosures. From what I can tell you go from a 6 1/2" speaker to a 6 1/8" at best, but at least it's facing you not your ankles.