The 1920x1200 TN panel displays are starting to really vanish. All the new ones are 1920x1080. I guess because it is a native "HD" resolution and they can market it better or something. The 1920x1200 displays are still the choice for IPS panel displays, but they are $500+ and aren't as fast for games.
That Asus is the one I looked at but talked myself out of it. I am still running on a 3+ year old 1680x1050 Dell 22". It was great at the time and for $300 was a steal. It still does a good job, but can't get myself to drop the money right now. Anyways, I like that one because its a good panel and it has a swivel and height adjustable base, which is rare anymore in the normal ol TN panel displays.
You have the same PSU that I have and it runs the 5970 like a champ, no problem. It would probably run a 2nd if you wanted. It is probably more than what I need, but I sorta acquired it from ASUS after they screwed up my RMA 4 times on a 5870 :-P