4K Linux video cards?

[Ken D'Ambrosio]

Hey, all.  4K TVs/monitors are really dropping in price.  Monoprice has 
a 28" for $400... which really starts being tempting.  But I have no 
idea what card to drive it with.  I do *NOT* game; if it can move 
windows around, I'm rocking.  If I can play TuxRacer, my video 
experience is complete.  So: any suggestions on a card to get?  The 
easier/more compatible it is with Linux, the happier I am.  Cheap is 
nice, too, but compatible is really at the top of my list.

Thanks!

-Ken