ill second that JSE/Wooch
however, as far as the room calibration, i can say that it really isnt all that its hyped to be. you are far better getting a separate calibrating device, or using your ears. i would definitely not get the yamaha based on this so-so feature. as far as yamaha vs denon go, well both get raved and ranted on about equally, even if you look at "what hifi" reviews you will find they both fair pretty good-very good. you are already familiar with denon sound. if the yammie is a very very better deal, then that could be fun just to try some new sound. (this makes replaying old cds and dvds a lot of fun). Otherwise id agree that you should consider adding a power amp.