I use the 30 and it's ok but I would not want another sitting on the desk.
At 2560x1600, the native resolution is too low. It should be twice that (5120x3200) for finer pixel pitch. The WUXGA 15.1" display on my notebook at 1920x1200 look better. The 23" at the same resolution has the same issue.
The problem isn't with the size, it's the amount of pixels they're putting in there. It's like buying a printer that can print larger pages but at the same DPI. We need more DPI folks! No wonder they have clear type. (crap IMO)
LCD's at 1280x1024 (a poor aspect ratio) of up to 19 inches are available and these look absolutely horrible due to large pixel size. People will quickly blame the technology when it's not the issue at hand. I'm willing to bet a lot of them forget the era of .41 dp CRT monitors (and worse!).
Cheers!