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UT3 does better with the Q6600 than the 6850.

Yea, UT3 is fully multithreaded game, but if difference between, say, E6750 and Q6600 is about 2%-10%, does it really worth spending extra $100 for Q6600?
http://www.anandtech.com/video/showdoc.aspx?i=3127&p=7

I think these extra $100 are better be spent on a better video card (say, a 8800GTS 512MB instead of 8800GT), then you'll get a performance increase in EVERY game, regardless of how well it is optimized for multithreading.