I see that I can jump from 9 to 9Pro but I was wondering about if I wanted 8 Pro.

I mix alot of windows so id like to have unlimited video tracks...and Im not sure if it would make a difference but the video preview screen its just a huge pain because of the lag....and yes ive read thread after thread on trying to fix it and nothing works.

I have a quad core - 4gig..nothing running in the background and still get tons of preview lag