Faster X4 is going to game better than a slower X6. It is as well easier to overclock the 965BE.
Just needed to hear it from someone who knows what they're talking about. Thanks.EDIT:
This is the build I was going for for my friend. I wish I could get 8gb RAM, but it's over double what I payed for my 8gb
The total price is $497.62 after taxes ($500 budget).