WAY ahead of you. I already have a second monitor, although it is an LCD that came with my new Dell. What I planned was, to use the new 17" LCD with my old Dell for web surfing, email, office apps, etc. Then use my 21" CRT with the new computer for PS & graphics (the new one is MUCH faster, more memory, etc). Then (and here's the brilliant part) I have a button on the LCD that lets me choose the source on the fly, and its sitting to the right of the 21" CRT. When needed, I can hit the button and turn it into an extended screen for the CRT. Since the LCD supports both the analog signal from the old computer, and the digital signal from the new computer, and the 21" monitor will hook into the analog part of the video card on the new computer (the card has one of each type connector) its a piece of cake, if I can get the big monitor to look good.
Andy Pearlman Studio