Intel processors are much faster than AMD in video editing
Check these reviews
Also, you haven't explained why you think that Core 2 Duo is not impressive ?
Anyway, if you want to get Intel then get Q6600 or E7200 if you are on budget. And get a P45 or P43 motherboard
and right now, divx is capable of utilizing as many threads as you want it too, same with vdub and xvid. we did another test my friend and i, and we set the affinity to one core for the process's, oh buddy, did that make a difference, i dropped from about 4 minutes an encode, to over 6 hours, he dropped from 7 minutes to 4 hours.
even before we upgraded our software and set the threading capabilities of them, i will admit, his was faster. but as soon as we optimized our software for multithreading and multicores, the speed difference became drastic. 4 minutes, vs 7 minutes.
i even downloaded the programs they said they were using, didn't know the settings they were using, so i set them to what we use, and the results are the same, my 5000+ be beats out the intel e6000 in encoding.
so yeah, if you hide the results, by not configuring the software correctly to run multi threaded or to use multiple cores, the results are different. later, i will post screen shots of vdub running fully optimized on both machines, i will use probably a dvd rip of a tv series that we make to watch on cellphones when we travel.
they are usually 350 megabyte encoded to avi format, using vdub, i will knock them down to around 100 megs and show screen caps of each.