I'd suggest you to get a good quality PSU, because the cheap ones can throw random errors, or worse, fry internal components.
The reliable brands are XFX, Seasonic, Antec and Corsair. Rosewill make good PSUs too.
Here are a few suggestions:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817207013&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139050&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID= http://www.newegg.com/Product/Product.aspx?Item=N82E16817151094
I would suggest the Seasonic, but that's my personal preference
Would you like us to make suggestions to the parts you've already chosen?