B Beast :
I would get a 600w psu for future upgrades http://pcpartpicker.com/mr/ncixus/evga-power-supply-100b10600kr
The thing is I've already bought my mobo, cpu, and PSU. Is there another GPU you'd recommend that performs similar to the 280x and is under $200 mark?
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202137&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=