Excellent. Thanks for the replies.

I really don't have the option of turning the graphics all the way down, 'cause for this setup it's important that all the screens be running at 1280/1024.

I probably could save 5 or 10 dollars per system by dropping from 80 gigs to 20, but I'm not sure that's enough of a savings to justify completely gimping the computers for any other possible use.

In any case, thanks for the input, I still have about 2 weeks to convince the wife before I actually buy any of this stuff, so I'll keep looking and see how low I can land.