Thanks to all so far for the helpful comments. This brings up something else I've been considering. If I go the Mac Pro route, I've been comparing the Apple ACD vs. Dell 2407. From a spec standpoint, it looks like the Dell's got a slight edge over the ACD with better contrast ratio (1000:1) and refresh rate (if I remember correctly). Is there something else I should take into account to better evaluate the two? What are everyone's thoughts and preferences?
Thanks again for helping out a newbie to the forums. What a great resource!