Movies in stereo aren't all that bad. Sometimes I do it, even though I have a full 5.1 system. I'd suggest that (if you haven't already) you try it out in your current place, as you could switch between stereo and full surround very easily. Well, I'm assuming that your Denon can do it as easily as my Pioneer, but maybe not.
You could also look into some of the techniques discussed around here for running wires to the back wall and/or wireless options. I thought about both for years, but I ended up running flat wire under my new carpet when it was installed in December.