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.
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M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana