Looking for a new computer screen

[Giovanni]

Well what with me moving in july and all, I'm thinking about getting a new computer screen but I do have some concerns.

Since I'm also getting a new desk mostly made out of glass and steel, I need something that's lightweight, my 21" monitor weights easily 40 pounds and while I don't want to get rid of it since it's my overgrown baby and all but I feel has if I'm sort of obligated to get a new one (weight and size is my main concern for the current one).

Now I was thinking going LCD but I heard they tend to ghost with FPS's and pixels tend to die...

I know almost nothing about computers and even less about screens, do any of you have a recomendation or suggestions as to what to look for? I'm looking for something not too expensive but with a decent size... (17" or 19") and the best quality I can get... 400$ is my budget.