A friend of mine has the Onkyo 875. I recently spent some time working on it with him. It's got a very nice interface, and certainly powerful amps, but the pre-outs don't work properly. Sometimes you get volume control, sometimes you get full signal straight to the amp! That's a tad hair raising in a 15x15 room (guesstimate, probably totally off) when you're dealing with an Emotiva MPS-1.

I am the Doctor, and THIS... is my SPOON!