A friend of mine recently bought a Sony Bravia 55" HD tv and is using his for a pc monitor, also. Resolution is at 1920X1080P (TV limit, but not GPU) and we are both extremely pleased with the quality results. No kidding, I was a little skeptical at first, but we are blown away with how great it looks! Text and photos look great! He is a photographer who also does Photoshop work on it! If you do a lot of reading on forums, then this is a great way to go.
Now, once you go this route, you can NEVER go back to a scrawny, regular pc monitor.
Now, I'm gonna have to get me one!