Adding/Changing Fan(s) on Hyper 212 Evo

[Azok]

I just ordered the rest of my build and will be putting it together in a few days. I have a 3570k with a Hyper 212 Evo. Due to the overclocking temps of the 3570k, I figured I would do push/pull on the 212 Evo.

My main concerns are:
1. Will having push/pull be noticeably better?
2. Are the CM fans sufficient? (plural- as in, if I were to buy one more)
3. If they aren't, how do I know which fans will fit it?
4. If I only buy 1 fan and pair it with CM fan, will different CFM matter?

I find it odd that the CM fan is listed at "24.9 - 82.9 CFM" on the Hyper 212 specs. Can anyone verify this?
Assuming it's actually http://www.newegg.com/Product/Product.aspx?Item=N82E16835103069

 

[dragonsamus]

Having push/pull is better but I think its like just a couple degrees. The fans will be fine. The CFM adjusts depending on the speed of the fan.

 

[dthesleepless]

The Hyper 212 Plus came with kind of a loud, crappy fan, but the one on the Evo is way better. It performs excellently and is pretty quiet.

Push/pull generally reduces temps by a couple of degrees like dragonsamus said, but not really noticeably.

 

[Azok]

Well it looks like the 212 evo fans are no longer available by themselves... and if the blade master is the one that is loud and crappy... I don't know what I should get now... I think the 2 fans would help, since I will be overclocking.

 

[Azok]

If I only used 1 fan, would it be better to have it in front of the heat-sink pushing (I think that would be pushing) air into it? Since I have 2 exhausts on the case behind it?