I want to buy a 21'' CRT monitor for my dorm, and I have 2 computers. I believe there are monitors that allow you to hook up 2 computers to the same monitor and then toggle between them. Anyone know what those kind of monitors are called or have a really good one that they would recommend? I also want to be able to watch tv on my monitor, are there monitors with tuners built in or will I need to get an external device? Since I live in a dorm, I must be conservative with space and 2 monitors and a tv would take up half my room. Thanks.