Here's what I would recommend to you...
For the GPU (Base Price 590$ on 220$ Rebate for 370$!):
MSI GeForce GTX 980TI 6GD5T OC
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127902&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker,%20LLC-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=
This card is currently
220$ OFF, so get it quick for the extra performance for your money!
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For the Power Supply:
EVGA SuperNOVA 650W 60+ Gold Fully-Modular
http://www.superbiiz.com/detail.php?name=EV-650WGQ&c=CJ
This PSU is 75$ but it's one of the cheapest ones out there that will match your PC. And it's EVGA, so it's reliable.
I STRONGLY recommend sticking with 80+ Gold with such parts. Also you saved money on the GPU, so you're still under budget!
If you were wondering, there is no "Best match" with your CPU, since some games use more CPU, others more GPU.