Sarasota,
could you please do me (us) a huge favor by coming back and reporting how your Appian Rushmore runs digitally on your new LCD's and what OS and motherboard spec you're able to run it on.
I've had the Rushmore for a few months now, first one has been replaced, and the second one is different (revision number) but both don't work under 2K and XP. Appian suggest that I wait for the next driver update for XP. Read back on my thread on my experience with my first card (which is similar to my problems with the replacement). I hope this issue is specific to my hardware and that you have success with it (so I can go and replace my motherboard if that's the case; system is P4 1.6 512DDR). Thanks for your help in advance.
Leland, the Dell at 1600x1200 is a great feature and price, but there are no cards I know of today that can run that resolution digitally. Matrox G200MMS will only do 1280x1024. Appian Rushmore, same thing. Even the not yet released Nvidia Quatro2 NVS400 only does sxga. You can run that resolution in analog mode from almost any card these days.
As to the original poster, I'd go with the 2 monitor higher resolution setup. And if you're not getting any more monitors, you can go out and buy a dual DVI AGP card from Matrox G550, or wait for the Nvidia Quadro NVS200 at the end of the month going for $150 dual digital. Matro is working on new G450x2 and x4MMS models coming in Q2 they say.