Kirk, One thing I would consider if I were buying a new desk top system is, A, get a widescreen 16 x 9 ratio monitor, and
B, get a video card with multiple outputs.
I have found reasons for having several applications opens at the same time. As you probably know, with a wide desktop, the second screen could run an app, while monitoing the other. Although, there is a priority of which one is in use.
I have also found that high end display panels with either DVI or HDMI inputs are growing in resolution and capabilities each month. Make sure the display is compatable with your card of choice. You may be able to find a large monitor with several types of inputs. Examples approach 16x9 ratio television sets, like a large LCD, or Plasma tv with NTSC and ATSC tuners. Suitable in size for the desktop, these can also be used as high quality computer monitors, or to display your home video camera playback
Eventually HD DVD will be common in computers. http://www.pcworld.com/article/id,126003/article.html
With a brand new hotrod pc, you'll be happy you bought the best display you could!
Good Luck
mike
My Dad taught me to keep my mouth shut and let people think I was stupid, than open it and remove all doubt!