You are right to look for a quality psu.
My short list of quality brands would include Seasonic, PC P&C, Antec, XFX, and Corsair.
You can safely buy from any of them.
I think your gpu only needs one 6 pin power connector and 24a.
For $25 after rebate, the Corsair CX430 is a great deal. I have used them before, and they work well.http://www.newegg.com/Product/Product.aspx?Item=N82E16817139026
A good stronger unit would be the Antec earthwatts green 500w unit at $50 after rebate:http://www.newegg.com/Product/Product.aspx?Item=N82E16817371035