I am with farkedup - you will get a lot more value (and desktop real estate) if you get 2x 22" monitors. I have 2 Acers and they are fantastic. I couldn't go back to a single monitor.
Here's a good article on the subject:
clicky-click
There's a number of amazing tools that make having dual screens so much more fun.
http://www.binaryfortress.com/displayfusion/
http://www.basta.com/ProdZMover.htm
http://www.nvidia.com/object/feature_nview.html