Yes, the Nvidia cards are standard, using the 560ti, but in one-two months are the new 7xxx line from ATI on market, with their GCN - GraphicsCoreNext, from what is for study about this, they should be very well optimized for our stuff - GPGPU use, therefore a lot of performance gain, but as history learn us benchmark should let us know what the best, im preparing a scene for benchmark that is nice and is useful - that we can compare what the best.......
another issue what i get notice, i tested a mesh with around 35 mil triangles, and it seems that new drivers slowing down viewport, but must go deeper over Christmas where is the problem.....