More Pixels Please!

I reluctantly sold a 20" 1600x1200 Viewsonic with the desktop machine when I switched to my current T60 laptop (14" 1400x1050) about a year ago. The screen is not the strongest point of the T60, and that feeling has just been reinforced by looking at some 22" Samsungs at work. Now prices have plummeted again so I convinced myself that I need a 24" 1920x1200 Samsung 245B!

I need a smart way of managing my desktop for normal mobile use (1400 pixels wide), working at home with this new toy (1920 wide), and giving talks/lecturing with video-projectors that are usually only 1024 wide. Any ideas?