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#11
You could just go for a dual core, try to unlock the other cores, and maybe overclock it. You'll easily have it preforming at way more than its worth.
This is assuming that it's other cores are good.
I got a AMD Phenom II x2 BE for this very reason.
I got the Antec Sonata III from newegg. It came with that PSU I believe, and was only $100 for both. It's a great case, could use another fan though.