I have played around with different crossover/small/large settings. Lately I've just left everything set to small, with an 80hz crossover on the receiver. On the sub you should have the crossover know turned all the way clockwise, to get it out of the way. I have found my Denon autosetup to be pretty close. Like Jack, I have my center bumped up a few notches as movie dialog sometimes seems quiet, depending on the movie.
Many have stated that music is better at 60hz crossover. I've tried it both ways. I think I like 80hz a little better, as the sub seems to do better reproducing the LFE to me. Also, 80hz is pretty low anyway, and it is not like it just cuts off at 80hz, there is a slope where it blends.
