AMD Stock Fan Replacement

Here's a question regarding the stock AMD fan. As a background, I'm using the 4-heatpipe version of the stock heatsink. The fan itself is secured to the heatsink using 4 clips and 4 pins that clip over the small "lip" of the 70mm fan and the screw holes respectively. Therefore, I believe any 70mm fan will do, so long as it doesn't have a massive, thick lip.

The question is: Does anyone have any 70mm fans to recommend? It doesn't necessarily need to be silent. Good airflow and reliability would be traits I look for. If this is a venture that's not worth it, let me know. Thanks!