Everything in the Radeon 5000 6000, and 7000 series should have at least one Dual-Link DVI and many cards have Displayport, since that should be a Dell U2711 monitor. Even a 5450 or 6450 will support that resolution. If you aren't going to play games on it then they would do the job.
OP that's a massive resolution. The more GPU power you can get the better.