I currently have a decent Samsung 21" CRT monitor. I will be upgrading to a Mac Pro soon and would like to add a second monitor. I'd like this second monitor to be around 20" (square) and LCD. I'm looking to spend approximately $400, give or take $100. My biggest concern with an LCD monitor is being able to get accurate color/contrast for photographs and video (without banding). I would very much appreciate any suggestions you might have.