Advise on which video card to use for 3 2560x1440 screens

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http://askubuntu.com – I'm looking at setting up a new system. Asus P9X79 Motherboard Intel Core i7 3820 3.60GHz CPU 16GB A-Data DDR3-1600 Corsair AX850 and the video card. I'm aiming to use 3 Korean monitors 2560x1440 The machine is only going to be used for software development and web surfing. Nothing graphics intensive, but it must have 3 screens at 2560x1440 (I've already got 2). What experience do people have with this screen configuration? What video cards are recommended? Now I've been looking at a few video cards. I think in most/all cases I'll have to use active dvi dual-link to DisplayPort adaptors on 1 t (HowTos)