dual head videocard-PCI DVI 1600x1200

I wish to compare, before buying, dual head video cards for my new two additional LCD-DVI

for future upgrade I wish to have a dual head Video-Card, with DVI output, possibly with enough memory (>16SGRAM, even better if DDR
The top would be that this video card be able to run 1600x1200 in both LCDs (for future upgrade to 20inches LCDs)

I don't know if such a board exist: Appian Gemini, I guess, has double DVI output, but can only run at 1280x1024

Matrox?
Others?

Waiting for your kind suggestions
 
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