3D Vision @ 720p: GTX580 or GTX570 SLI?

[Badelhas]

Hello,
I bought a 720p 3D vision Projector but they are no benchmarks at this resolution. Will a gtx580 be enough or must I buy 2 gtx570 in SLI?

 

[bystander]

That's a pretty darn small resolution. I'm sure a single 580 will get the job done for 3D.

 

[Badelhas]

Did you ever see on internet any reviews for 3D Vision at that resolution? I should refrase the question: will I see gains if I go from a 580 to 2 570 in Sli?