Start with what you need.
In this case, you need a 450w psu with 24 a.http://www.evga.com/products/moreInfo.asp?pn=01G-P3-1464-KR&family=GeForce
500 Series Family&sw=
It is not wrong to buy more, since the psu will only draw what wattage it needs, and will run quieter if it is not pushed to the max.
Any of the units you listed would be ok.
The first rule is to buy quality.
My short list would include Seasonic, PC P&C, Corsair, Antec, and XFX.
Or, pick a tier 1 or 2 unit from this list:http://www.eggxpert.com/forums/thread/323050.aspx