What kind of stuff are you doing? The apple cinema displays are awesome but expensive, as said. For video work I would recommend having a separate screen as a monitor. I think I agree with Ben, that a flat screen CRT would be the best for monitoring. A nice normal CRT also works great and I'm sure you can find one easily. A great and easy setup is to have an LCD, whatever you prefer, for your editing, and output to a nice big CRT to monitor. Then you can monitor, at least in FCP, and I'm sure in Avid, on both a small box on your LCD and big picture on your CRT when you need it. Seeing it on the CRT will also help if you are going to color correct yourself at all.