Thanks for all the feedback and tips, I really appreciate it.

I've pulled the M80's forward about six inches and moved the VP180 up a bit as well so they're flush, and re-ran Audyssey calibration.

I moved the couch up about a foot, to be closer to what is supposedly the ideal viewing distance of about 6.5ft, though it seems really close to me. Probably just need to get used to it.

Not sure about something to put on the back wall. A fuzzy moose picture is out (this is California, not Ontario ;-) ) but I'm sure I can come up with something suitably library/man cave-ish...