Hey great ideas! I didn't even think about the preamp outs with an outboard amp - that way I can stage going to seperates over time. Not a bad idea at all. I'm also interested in looking at the Marantz av receivers, as I've heard good things about them but never really considered them. The thing about reading reviews about A/V receivers is that there is a sliding scale - one person will say X receiver is amazing, because they only have used low end receivers. Another person will say X receiver is trash, because they usually use high end seperates. It's a sliding scale :)
Eventually I plan to retire the Denon even as a preamp, because I want at least component video switching (just grabbed a new Samsung 42" plasma) if not the new fancy HDMI stuff. The guy at Circuit City poo-pooed component and said HDMI was the only way to go for HD, but I'm not so sure I believe him.