For an LCD I think you're looking at 21" or greater to get 1600x1200. With a CRT, you just have to make sure the resolution is supported by the monitor. That being said, a 17"-19" monitory at 1600x1200 is very hard to read. Also large CRT's (> 17") are a b-tch. Take up a lot of room, burn lots of power, generate lots of heat.