I use a single 30" screen at work now, but before that I was using dual 21" monitors.
There are things I like about both,... the single large screen has more resolution (especially vertically,... 2560x1600 vs 2048x1080 for dual 1280x1024)
That extra screen space is nice, but I really feel the computer took a performance hit due to the extremely high resolution. (I'm using all high end stuff, so it shouldn't be an issue of not enough graphics power) We also moved over to Vista and added other hardware at the same time, so It's hard to get a direct comparison though.
Personally, I really like the 2 screen setup. I put extra menus and my web browser on the right monitor, and then I could work full screen on the left monitor without anything getting in the way. The large single screen feels a bit like going back to what I had before the dual setup, where I always have to shuffle what is on top.
As I mentioned before, the single setup actually has more resolution, so it's possible to just position things differently on the single screen, but I liked having the physical divider to split things out.
There are things I like about both,... the single large screen has more resolution (especially vertically,... 2560x1600 vs 2048x1080 for dual 1280x1024)
That extra screen space is nice, but I really feel the computer took a performance hit due to the extremely high resolution. (I'm using all high end stuff, so it shouldn't be an issue of not enough graphics power) We also moved over to Vista and added other hardware at the same time, so It's hard to get a direct comparison though.
Personally, I really like the 2 screen setup. I put extra menus and my web browser on the right monitor, and then I could work full screen on the left monitor without anything getting in the way. The large single screen feels a bit like going back to what I had before the dual setup, where I always have to shuffle what is on top.
As I mentioned before, the single setup actually has more resolution, so it's possible to just position things differently on the single screen, but I liked having the physical divider to split things out.