One thing you'll want to do is set your center channel to 'large' and see how you like the bass coming out of the center. I would imagne you'll like it. I run my M80's set to large and don't notice any 'double-bass' problems others experience. Even though they aren't technically full range speakers, the M80's (and VP180 I would imagine) do a great job of reproducing bass IMO. You should at least try t out and see what you think.
_________________________
My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD