I have a Denon 4308 and would like a little more authoritative and clean power for my home theater setup (want to keep the Denon as Pre/Pro for now due to features I like). My local dealer carries Parasound which I like and works with me on price. The speakers I am running are a Klipsch RF-63 system. I would like to know if a Halo A52 would be a good choice or should I go for the higher wattage of the A51? Also I was wondering if anyone has had any experience with the model 5250, which from what I can tell seems to put out pretty much the same wattage as the A51 but with less current output and fewer features. Any info would be greatly appreciated.