Have the 990 running the show, and a Harmony 880 to do the remote control. One issue I haven't been able to resolve, is that when I power on using one of the activity buttons on the 880, the 990 always goes to "TV", which is what I named one of the inputs on the 990.
So then I have to choose the activity again, and all is well. Not earth-shattering, but it's weird.
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Current: Denon 3311ci, Anthem PVA 5A amp, Ascend Acoustics Sierra stereo mains, Ascend Acoustics 340 center, Aperion Surrounds, LG Plasma