Yup, that'd be perfect actually...
Well I mean fox, Put it this way> You have a 1600x1200 computeR (example) and you have one 7800 GTX.
THe GTX will look great even at low AA settings, but I mean as you go higher in AA and stuff, it's like an exponential progression, it's eventually get smaller and smaller of a difference:
Example :
2x AA from no AA will look very noticable
4x AA from 2x aa will be a little bit more noticable
6x AA from 2x AA will be barely recognizable, if at all... It all depends on the 2 things that we have jammed in our skulls. Our eyes.
Everyone has personal nitpicks, mine was not being able to play games with 2x+ AA on 2560x1600 with 1 card, so I added another.
Your machine should manhandle a 1900x1200 and a 2560x1200 because your cards outperform a single gtx by alot and they will make up the difference that my 1 card lacked.
I would have gotten a GT if you could SLI unsimilar cards, but you cant, so rather than selling my single gtx, I just decided to get another.. It's all personal preference.