If my goal is to have a 30" monitor, I need something that can drive it. The USB-DVI adapters seem to top out at 1920x1200 or thereabouts, and I'm suspicious of whether or not the extra USB traffic would impact system usability. Also, pragmatically, there isn't really room on my desk for dual 24" monitors. Going to a single 30" monitor, however, looks like it could fit.