Corsair tx 650 is a great PSU (I have one in my pc) Corsair now has another reversion called the tx650V2. They have a larger fan in them. They are still made by Seasonic though which is a great OEM
Antec is another good brand (their HCP and HCG units are made by Delta and Seasonic)
If you want add a second card to your rig for Crossfire
I would recommend you go with a 750 watter.
My recommendations are Corsair TX and AX series as well as Antec High current pro, and high current gamer series.
If you go with anything else look at reviews on good websites such as
Toms hardware also has a few PSU reviews
Tech power up
These sites test power supplies on a load tester that checks for voltage fluctuations that are harmful to the sensitive components in a PC.
Hope your build comes together nicely