PSU recommendation?

Anyone recommend a 500-550w PSU for my PC?
Ive been looking at a few such as

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182199

http://www.newegg.com/Product/Product.aspx?Item=N82E16817151094

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139027

http://www.newegg.com/Product/Product.aspx?Item=N82E16817152049

Any insight would be appreciated.

 

I have the corsair you have listed but the 600. Works good, no problems.

 

Here are some slightly more expensive but, they are modular psu which are better for cable management and airflow.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817152049

http://www.newegg.com/Product/Product.aspx?Item=N82E16817152035

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182131