graphics card

ok, i have a really old video card i cant seem to get working with debian,
although it might be the monitor, it is time for an upgrade anyway :) I've
seen some decent prices on nvidia cards, do these work well with linux?
Also the prophet cards, do these work well? Would be a plus if they were
well documented. The particular cards i was looking at are

3D Prophet 4000XT Video Card, 32MB, AGP          -              $59.99

and

3D Force B-32 Plus Video Card, AGP, 32MB         -               $38.57