Quote from 3vian:
1) 17" is enough, a 19" and 18" will actually have the same native res. (except if you get a more expensive 19") of 1280 x 1024.
2) Analog can actually be better, since you can in certain cases get more colors than with digital (but you would only care about this for DVD, video editing and gaming). So what ever it is don't worry (but digital is nice since u don't have to fiddle with it).
3) If the graphics card is dual head it will more than likely support two separate resolution each with their own refresh rates etc..., but check the maker's website.
4) I am myself looking at lcds (more than likely going to get 3 thou), and i like the new hyundai imagequest Q17 (not L70). It looks nice and is a good monitor, plus hyundai is one of the few manufactures that will replace a monitor once it has 3 dead pixels (in practice they actually replace it once it has 2!!!)
5) Oh, and I would get 2 lcds and sell that crt (or 3 if u can afford it, but u will need a pci card for the 3rd monitor)!
Hope that helps