I alternate from working at home and working at the office.
I've got a beautiful 24" widescreen monitor at 1900x1200 resolution at work... talked the boss into it when he assigned me to make an ERD document for our database, and I couldn't "see" any of it on the screen with the 17" I used to have.
So, I've been at home working on my personal PC, doing some coding. Going nuts bouncing between screens to compare one source against another. I've got a pretty nice 19" LCD that isn't a slouch with screen real estate, but I just don't have enough room to have everything open at once!
I ordered a Samsung 24" 2433BW monitor for $299 with free shipping. Wow. What a steal. I also got a Seagate 7200.10 (I love this series of drives!) 640gb drive sent with it @ $69, also with free shipping. I was running out of drive space, too.
I'm going to try and NOT dual-head the home computer, and just get by with the 24" on the desk. I'll probably sell the 19" I have now... It's in excellent condition with no dead pixels and frankly is a wonderful monitor. Games well, no ghosting or lag or anything. Princeton made it and I got it at Costco 3 years ago for $300. I'm thinking a CL ad @ $90 is fair, since new ones go for ~$125.