hi mate

have you seen what nvidia is doing with CUDA porting video encoding

with a bit of luck and some more software developers we will have some wider range of codecs ported to do encoding on GFX cards which are far superior

have a look at the video i took during presentations comparing a CPU vs GPU encoding

http://www.youtube.com/watch?v=8C_Pj1Ep4nw

you'll be buying 8000 or later series GFX card if you're after the right system

quad will still help you in the mean time while we get someone to port divx and other codecs to CUDA