From a personal perspective, i would rarther go with the CHIMEI 221D, i just like the way it looks and it is probrably the best of the three you have listed.
I'm leaning towards the Chimei also. Quality is more important the how it looks.
Viewsonic? - I've heard a lot of bad things about their LCD's. In the past, with CRT's, I would agree though that they were top of line.