Oh, you even have the exact same receiver as I do.
Setting a speaker to small, causes the receiver to roll off frequencies below 80 Hz (by default; that is selectable, but the next lower 50 Hz seems too low for most speakers), while taking the information which is removed and sending it to the sub instead. There's no reason to change the EQing.
I found the MCACC does a wonderful job of calibration. Even better if you go to the custom, and allow it sample 3 positions for phase alignment. I also prefer the independent EQing for each channel rather than the symmetrical pairs. If you need help with getting it to run through that mode let me know, I'll give you a step-by-step when I get home.
