The ultrasharp from dell gets very good writeups, the one out of your list I would go for is the belinea 102035w as it is the widescreen monitor of choice for the only mag that I use for hardware buying decisions.
'the panel is bright and copes brilliantly with games, offering smooth updates and great colours. The 1680 x 1050 res makes games look fantastically dramatic and cinematic.'
Me, I'm saving up a few months to get the samsung 244T.
Hope this helps.