If you think that you will upgrade to an SLI or CrossfireX setup in the future, buy a newer video card and avoid the 69xx cards.
I'm not sure how the GTX 650 Ti compares with the GTX 660 video cards.
I like the video card reviews at HardOCP because they don't get hung up with absolute FPS statistics, and they focus on game play experience and game settings when they compare video card performance.
I prefer to buy a higher end video card model that has superior cooling and lower noise levels.
Cards with more memory will be better if you upgrade to a multi-monitor setup or 27" monitor(s) in the future.
My preference is for MSI video cards for quality, performance, features and length of warranty.
I had no problem with both of my MSI rebates.