Yep, two ep500's versus one ep600 was one of the things I've been trying to consider for weeks. After talking to many many people (sub gurus) I decided on the single ep600 for now. If I had a smaller room, and more problems with achieving a flatter freq, 2 500's would have helped. I want deeeeeeeper bass.

Nick, I've got a few guys at work interested in my current setup.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85