Thats a tough call, but I'd say it depends on you. Because you're comparing a AG(Aperture Grille) monitor against a Shadow Mask monitor. Some people like AG, some people like shadow mask. If you're not sure what Im talking about go to a store and take a look for yourself.
Personally, I would pick Mitsubishi, because I like AG, and it's purely flat, great image quality and good brightness. The Hitachi on the other hand, is a good monitor as well, they produce some of the best shadow mask monitors. Dont listen to those who trash Mitsubishi, they're not a crappy company, they're a great company.
If you're gonna spend $1200, I'd say get something better than KDS, get a big brand. Not saying KDS sucks though, but really, you dont want to throw a way your hard earned money for some small brand.