Your pic came back! (If the image above is not visible, click here .) If your sub is being crossed over at 80hz you are not going to be able to adjust above 80Hz at all (except to equalize volume levels) because the sub will be out of the picture by that point.

Having said that, I'd say that you've done a very nice job with the sub EQ'ing. I'd probably zero out the EQ control at 100hz since it's not going to do anything useful for you and could actually create problems if the sub gets 100Hz data from a DVD's LFE channel - it'd be a spike in volume at that point, and that spike is only going to throw your overall frequency response off.

One thing you might try is turning the SMS-1's volume down from 20 to perhaps 12 and then turning the receiver's volume control up a few notches - that would bring the sub's output in line with the upper values being produced by the speakers and might help the sub blend with the mains.