Dodgealum, thanks for your response. I did find it helpful. There is sufficient ventilation for the 100.2. However, it is so hard to find these days that I might opt for something else. Good to know that you are satisfied with the 150.2. I want to replace a Rotel RB 1080. The Rotel has been a real workhorse. Never gives me any problems at all. I just believe there are better sounding amps out there. Also, the Rotel does not do well when played at low volume levels. I do want an amp that is similar to the Rotel in terms of physical footprint, weight, and having balanced inputs.