Correction - mid tower Cabinet- Two monitor requirement-No gaming requirements- remote desktop to server running 1600 x 1200 res on the remote desktop. Any less res or more will not fit on the screen completely or in a window on the local screen. If we could match the resolution of the remote screen i believe we would be very happy. Cost is a factor. Thanks for your help.
with cost being a factor according to OP and no gaming than
really a HD4650 would be fine for driving two monitors at that res.
really even a 4350 would be ok.
the 5670 and gt240 are far superior cards but a little overkill
can pick up a 4650 for $40 bucks or so
also depends on connections on monitors (dual vga would be harder to find than
vga and dvi for example)
Check the AMD ATI (or Sapphire) 2450 PCIe 16x multi-monitor card. Search forum for my note on this -- specifically for the Optiplex 755. I'm driving four monitors from this card (plus the onboard makes five). FF and PS seem to be fine.