I would try to spring for a 955x chipset if you can, they are better OC'ers, and Asus would be a good choice.
Those 6xx chips OC very well. That HSF you picked is actually pretty good from what I have read, so you should be able to get a decent OC going. If you want to go a little more hardcore, the xp-90cu or the Tower112 is also a good choice for air cooling.
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DS3 | E6400 - 3.2GHz 24/7 | 2GB OCZ PLat. PC6400 | 6800GT | Zippy 460W
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