I'm thinking about adding a 7500 to my system (or 2-3 M2200's) once Outlaw comes out with their new pre/pro. I have a B&K Ref. 200.7 that is great but gets HOT. I'm thinking of getting the 7500 and using it for my 5 main channels, and running the 4 height channels off the B&K. My question is: how cool does it run for most of you? My speakers are PSB Synchrony's, which are fairly efficient but do drop down to 4 ohms at certain frequencies. Thanks for any responses!