I was also in your same situation Mark, I purchased my setup before the 500 became available. I'm also interested in the responses you get on this topic. I'm think about getting a second sub, possibly another 350 or maybe a 500 if I can talk the boss(wife) into it My basement is very large..
Randy
Axiom 60's 150 350 4-Qs8's
Denon 2805
Sanyo Z2 WXGA Projector
Panasonic S97S HDMI DVD
Samsung HD OTA tuner