I glossed over the part about $200 being for cpu and gpu only. If that doesn't count motherboard, and he hasn't bought it yet, then you can subtract 20 or 30 dollars from the AMD rig because the boards are generally cheaper.
Then again, maybe the correct answer is - "Do whatever you want, at 1024 the graphics will suck anyway."
Then again, maybe the correct answer is - "Do whatever you want, at 1024 the graphics will suck anyway."