Power Supply Comparison

Hi

I am upgrading my GPU to a MSI NVIDIA GTX 970 Gaming Twin Frozr.
http://www.amazon.co.uk/gp/product/B00NOP536Y?psc=1&redirect=true&ref_=ox_sc_sfl_title_2&smid=A3P5ROKL5A1OLE

So i would like to upgrade my PSU to a better one that can survive the monsters hunger.
My current PSU is a Corsair CX 500W.
http://www.amazon.co.uk/Corsair-Builder-Bronze-Power-Supply/dp/B009RMP2VE/ref=sr_1_1?s=computers&ie=UTF8&qid=1441059864&sr=1-1&keywords=cx+500

I found this EVGA one on ebay and thought i should see if this is better quality.
http://www.ebay.co.uk/itm/121747191549

Thanks