I used to have a dual 19"CRT setup, I recently upgraded to a 24" LCD and am using it with one of my previous 19" CRT's I had the typical bins on the left, edit on the right, but with all setups I typically found myself looking at only one of the monitors at a time. With the new 24" being my main monitor, I have moved my time line and monitors to the left and put the bins on the right. I have found this to be so much easier to work with.

I'v still got 2 19" but it does help having the dual screens.

Oh yeah, dual screens are required practically, I do miss having the 2 19" since they were both identical, however having the 24" Widescreen w/ the 19" has helped w/productivity. Being able to zoom in and get those precise adjustments are great, no need to get real close to that monitor. Plus for all of the Adobe applications that I use only on one monitor, its nice to make it huge.