Make sure you hit up the user "playitloud." He should be getting his M80 system any day and is going to be driving it with an Onkyo (not sure which one).

He can probably help you answer the question on the receiver's capabilities once he gets it set up. In the meantime, however, I'd take the advice here, and listen to the M60's. I think you'll be quite happy, though the "what if" game can be painful indeed! No matter how much you like them, if you hear that voice in your head, I'd go ahead and do the upgrade in the first 30 days. \:\)

Epic 80-800: HG Cherry