This depends on the type of dvi connectors you have. With single link DVI you can get resolutions essentially upto 1920*1200. To get to the 2560*1600 resolution you would need to have dual link DVI connectors. And the correct cables of course.
But as for "the best video card", the high end models support the 2560*1600 resolutions with DVI connection.
So, to get the other resolutions, you have to use HDMI 1.4 or Displayport 1.4
I should also add, that I wonder if maybe the reason some video cards list 2560x1600 as the max resolution is because of the limits of DVI. ... and by that same logic... I wonder if you actually used HDMI or Displayport, if those same cards could go higher. (I don't know the answer).