Some time ago, I was debating on a 500 to go with my 600 but ended up with 2 350's. The combination of those up front and the 600 in the back are killer, especially in the new enclosed theater. I know I know where are the pics.
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
(M22-OWM22-VP100)-all in storage