Now that i've pretty much figured out my avr, here are the settings i use...
by default, all speakers are set to "Large" and 100hz, rear speakers are set to "Bi-Surround" and they are -6db

DTS LD'S: normal, sometimes switched to 7.1 to enhance the sound, such as the shadow
AC-3 LD'S: normal
AC-3 LD'S: EX decoding manually turned on
most Dolby Surround titles: normal.

however, certain titles, like the Star Wars "Faces" are set to 200hz and the subwoofer is raised a little.
Movies that had a Split Surround 70mm release: PLII, 150-200hz and subwoofer raised a little.

Why do you set your xover to 200Hz?

100Hz is a little high for large speakers....
On stage it is good with top and lowfrequencie cabinets (not with subwoofers)
In my cinema setup, my speakers are playing full range

my surrounds are small, and my centre also has a small woofer. it helps to improve bass response.

certain movies were in the Baby Boom and Split surround format, hence 150-200hz.