I currently use a Yamaha E800 with a 10 year old Pioneer A300R driving the front Mission 734i speakers. I want to upgrade but can't decide between: 1. Denon 3802 2. Rotel 1075 power amp (either for all channels or just bi-amping fronts) 3. Nad C370 for front speakers I know I need to upgrade the front speakers at some point (the others are 77C1 and 77DS) and want amplification that will drive say Mission 783's. I expect that the Nad will give best pure stereo performance. But is the Rotel a bit of overkill for the little Yamaha? If I go with the Denon I will have 2 empty slots in my rack to fill. Has anyone experienced any of these combinations?