da noob :
Why are you suggesting either of these GPU's? They are expensive and not exactly cutting edge. Here are some GPU's that are better for about the same price point (if your system can take them): http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-3.html

Quadros are workstation cards and not meant for games!
It depends on what your budget is, both will do the job just one is going to do it much better, $140 card vs $400+ card
You can watch this video: http://www.youtube.com/watch?v=LV3YBhrD_D4