We are in the process of setting up three Plasmas. 1 60'' and 2 32"'s. I will need three DTV boxes one for each. Ideally we would like to be able to switch screens so that if I see a game on one of the 32's we can switch it to the 60. What is needed? also What receiver would I need for this set up? Doe sit need multiple HDMI outputs? Any suggestions are greatly appreciated.