Erik, you obviously didnt read the link I sent you about CUDA and what it does. If you had read it, you would understand what things its does speed up and what things its doesnt.
http://blogs.adobe.com/premiereprotraining/2011/02/cuda-mercury-playback-en...
Tom Daigon
PrP / After Effects Editor
http://www.hdshotsandcuts.com
Mac Pro 3,1
8 core
10.7.3
Nvidia Quadro 4000
24 gigs ram
Maxx Digital / Areca 8tb. raid
Kona 3