My 750 stays only warm, not hot, but it also has fairly decent ventilation (completely open front and back, plus a little over an inch clear above it). The glass door will definitely trap heat well. Only possibility would be cutting away the back of the cabinet at the 750 and 950 -- not only will it give some better ventilation, but it may also make wiring easier.

Zakman's recommended fan looks to be pretty quiet if you need the extra airflow. The noise shootout included at the directron site would suggest that the temperature controlled fan he's using is quieter than most.

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