aexin, your two setups are no competition at all. OK you're being charged an extra $130.05 for the AMD rig, but from that setup I'm guessing you're a gamer and well AMD were built for games, and especially the 4600!! I mean to compare that to a Pentium, you would have to buy a 4.6GHz (as the name suggests "4600+") dual core Pentium, and well you've got two problems there:
1. It's not even been made yet,
2. It would cost you an arm and a leg, and you would lose out to the AMD on pretty much everything.
You are getting practically the best of both world with getting an AMD for gaming, and an X2 for multi-tasking. There's no comparison