If he does look at a 7850 there is a XFX one on sale for $140 after $20 MIR. Just thought I would drop that in here for the OP. Never bought an XFX but its hard to argue with that price on a entry level card.
XFX Radeon HD 7850 Core Edition 860MHZ 1GB 4.8GHZ GDDR DVI HDMI 2XMINIDP PCI-E Video Card