I've got the same CPU at home, I love it.
Can't comment on the vid card really, never been a fan of ATI. But with 2 gig's of mem, it should display your porn sites quite nicely.
I'm going to assume you're going with vista 64, and not sure what else you do with the computer besides TF2, but I put 8 gigs of ram in mine, and I love it more then my first born.
Ok, I'm joking about the first born thing, it would be a tough contest.