2 stock fans as push-pull are very good. one of the best cooling setups you can do.
the delta as a push and the stock as a pull is very good.
the ones I list above that I found on ebay are better use the stock as a push and the ebay fan as a pull. you will be louder then 80db but they will cool off really well.
Since noise is a factor I run the delta as a push and the silverstone 141 as a pull.
I also use a rubber mat under the s-5 so it has a tight seal under the unit air goes upwards a bit which is okay as most of that air passes right through the heatsink due to the push pull.
At 368 clock I have 99.9999 correct. 14 errors out of 25 mill. this is pretty much a perfect setup. sound is at 55db vs 75db watts are around 600 at the kwatt meter.
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