Depending on whether you care about power usage or not, may be worth a look at the Phenom II x6 as an alternative at that price range. The intel will be faster clock for clock at default speeds but the phenom's are unlocked and very overclockable.
Looks pretty damn good for that price, certainly not to be sniffed at. Had a play with a mates 5750 the other day and was actually very impressed. bang for buck definetely a good call at the moment.