The Open CL so far based on reporting is as expected, not performing as well as the standard CUDA. If you have the ability, I would suggest the GTX 680 anyway. Otherwise wait for Adobe to refine their Open CL as they have the CUDA.
yeah, the GTX680 would without a doubt be great. do you know of any websites or forums that test all of these cards for PP to see comparitive performances? was hoping the non cuda cards (cheaper) could get the job done.
thanks for you input!