I dont think you will see a huge performance difference doing a pull/pull setup. I always buy high quality fans. You mention that noise does not matter. Do you shut your computer off every time you are done? I made the mistake of buying the fan that can move the most amount of air. Problem was, after I took my headphones off the computer was so loud I had to always shut it off.
If you want the fan that moves the most air here it is.
FYI, it is also fatter than a regular 120mm fan.
http://www.newegg.com/Product/Product.aspx?Item=9SIA25V3H31743
Edit: This fan claims to move more air.
http://www.newegg.com/Product/Product.aspx?Item=N82E16835706015
Wow that fan can move a ton of air.
https://www.youtube.com/watch?v=4m3XusgQ9No
https://www.youtube.com/watch?v=GSllkFWVhJI