It would help to know your environmental conditions, cause if you are in Mexico City, I can see that opening a window probably would not help much.
Here is some practical advice:
1) Why do you need a 46 inch TV in your bedroom? That's ridiculous. I have 19 inch Sharp 720p LCD TV that also does 1080i in my bedroom, so strongly consider downsizing! Yes games are fun on a 19 inch very good quality LCD, but I can see downsizing might give you some withdrawal symptoms. Tough it out!
2) Get rid of the 360 and focus on enjoying one console. Of course Sony is the best, so you don't think I would recommend anything else. Get the Slim, it still produces a fair amount of heat, but much much much less than the original. Only 50 watts also, so start getting the warm fuzzies by saving the planet.
3) You said Comcast box, so I presume the US? So open a window, it's almost winter, and you can buy a sweater. What do you think I do, with my PC, TV (both standard and Sharp for gaming, plus LCD monitor on the PC), Video harddrive recorder, and 5.1 Sony receiver. It gets hot in my room, and I open a window. Summers are problematic though. Yes, I sometimes watch TV, game, and browse the net, with all going at the same time. I'm no friend to environmentalists, but then again my carbon footprint is a probably a hundred times less than the biggest advocates of so called man-made global warning like Al Gore with all this huge houses, numerous plane trips, and many cars.
Opening a window probably contributes to global warming, besides all the energy you use, so you will be the ruin of us all!
