I have to agree with MarkSJohnson on this one. My room is a little larger, about 1800 cu/Ft. I not only use M60's with an EP500, but I also use 4 QS8's AND a second DIY sub positioned behind my couch along the back wall.
At night when the wife is asleep I need to turn off the SUB's so that the house doesn't shake. But the M60's still put out enough bass to make whatever I am watching sound good. And as mentioned, you will probably listen to some music eventually either through cable, radio, or a concert DVD. Then you will appreciate having some lower end come out of the front's.
