I've got a 17-inch iMac (core duo) that works great for my needs, but I'm finding I need more screen real-estate. I'd like to add a 20-inch external display, but I feel like the apple displays really don't match very well, and they're expensive too ($599 versus $230 for a Dell). However, Dells would also look pretty awful next to a white iMac. Any recommendations for a nice, matching display? Or do you think the Apple display is really the best?