My main reason for getting an iMac will be for video editing and motion graphics. I'll be using After Effects heavily, along with Photoshop, Illustrator, and Final Cut. Are there any benchmarks comparing these video cards for this type of use? All I could find were benchmarks for games and frame rates. All I want to know is if getting a GeForce GT120 will make my RAM previews and render time in After Effects significantly slower than a GT130 or the ATi card. Thanks!