Man, what complication.
Speakers set to cross at 80hz, everything below 80 goes to sub. Some smaller fronts and center should be set at 90 or 100, because it's better to let the sub handle that.
Low Pass Filter setting, 120hz because thats the spec for the LFE channel. If you sub has a built in xover, bypass it, if you cannot, turn it up to max.
Welcome to the Forum Gadgetfreek, and for the most part I agree with you...That said, Audyssey recommended a 40 Hz crossover for my RF-7s and after experimentation found that at 60 Hz you can't tell where the speaker leaves off and the subwoofer takes up the lower end...It just blends seamlessly.