You know, if you don't mind hunting for parts (even used) you can easily build a Intel system comparable in price to AMD APU. Just the other day I built a HTPC using i3-2120 (used) + Gigabyte B75M-HD3 (brand new) and these two parts cost me only $140.
Sandy and Ivy based Pentium has about 80% of gaming performance than comparable Core i3 and they are sub $100.
APU will probably hold at leas 15% of GPU performance from HD7850.
Well when It comes to pc parts I like them new because of warranties