Over 20" and under $200? Not going to happen. Well, it could, but... you'll hate the monitor that money will buy you. The closest thing to a decent monitor at that price is one of Samsung's 20" models. Those should run you around $250, but 20" is pretty small, especially if you plan on lounging while playing shit at all. And while i dunno the specifics of the monitor you'll end up getting, the best option is probably getting an HDMI cable and then an HDMI to DVI adapter to plug the PS3 into the monitor. A lot of monitors also have component video inputs, which are probably easier since you don't need to buy any adapters, but the video quality isn't quite as good.