I have two Samsung monitors which are using 1920 x 1200 resolution.
 
I've been handed  by my brother a decent specced computer... which has a AMD 5700 HD gfx card
 
It has the two DVI outs but .... want to chweck that my current resolution is available on this card..
 
http://graphics-cards.specout.com/l/54/ATI-HD-5700
it notes 
Max Digital Resolution Width2,560Max Digital Resolution Height2,560Max Analog Resolution Width1,920 
is that per screen?

That card should run 1920x1200 fine. Before I got my HD7950 I had a 5400 series and it worked just fine. I'm using a Samsung 24". As for dual monitors, it should be fine. Best advice is to plug it in and see, it wont cost you anything to try it.

hi - thanks for the confirmation!  Will try!

Yes, that is per screen.