When I composed my new pc, the included Asus P5N7A-VM motherboard included all the graphical output connections I could want. It appeared however that it was not possible to use the DVI and HDMI connection in one go. Therefore I would need another graphical card. So I purchased the Asus EN8400GS SILENT/HTP/512M.
It features a DVI-I Dual Link (24+4+1) and a D-Sub port