I switched to widescreen about a year ago. Before i used two 19" displays and was happy with them. The switch was also an upgrade in size to 24" and made a huge positive impact for some programs. Eclipse, Photoshop and some of my 3D programs profit really from that step ahead. If you ever worked with your favourite IDE on a big sized widescreen, you will never go back ( this does not apply to VI
). And as mentioned before: Only the native resolution assures crystal clear quality.
For habit reasons i also wanted to attach one of the previously used 19" but that wasn't as easy as i thought. It was not possible to attach both LCD's to one graphics card, because it cannot support 1920x1200 and 1280x1024 at the same time. The memory of the card with 768MB shouldn't be the problem, it must be a specification side effect.
Therefore i had to upgrade to a second graphics card. Now i have two nVidia cards inside the PC, one for each monitor and doing their job without a hassle.