That is a great idea. I am always tweaking stuff to see what I like best for both HT and music. So far with my Denon 2805 I have found setting the mains to small, with a crossover of 80hz, seems to be the best of both worlds. This is just my opinion, but 80hz is still pretty low, and there is a gradual roll of, not just a cut at 80hz.

good luck

M60's, VP150, EP350, 4-Qs8's
Denon 2805
Sanyo Z2 projector
Samsung HD receiver
Toshiba DVD

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