I have a viewsonic P95f monitor, which runs at 1600x1200 at 85hz. They go for maybe $225. Note that the refresh rate (in this case, 85hz) is important. If you get a monitor that will work at 1600x1200, but at a refresh rate of 60hz, you will never be able to stand to have it at that resolution, you'll feel dizzy just looking at it.