Very informative. Damn, I think you're gunna cost me some money.
I've been following this thread at videohelp:
http://forum.videohelp.com/topic336144.html
I'm a video hobbyist, and capturing/encoding would be my main concern. So my choice would be the reverse of yours. (Most video encoders are now multithreaded and the performance gain would be considerable.)
If "true" quad-core gets down to that price range, it'll be time for me to build another computer.
I believe you're right, if you go with the results on page 8 of the AnandTech review, your choice should now be easy.