You don't say why you are changing fans. Are they to loud or do you need better flow. I use Sharkoon and Panasonic fans. Sharkoons are powerful for the noise they create and the Panasonics (Panaflo) last forever although they can be somewhat hard to find. I am pretty sure that they are built by Rexus now. Nicko is right, if you use it as an intake you can expect a couple degrees cooler operating temps. Only do that if you case has fans on the top though.
Changing them because the Stock fans of the 920 is extremely loud at max, sounds like a plane taking off, and also because in near future i will be upgrading and overclocking pretty much everything in my case, so i'll need the best flow i can get.
Thanks for that link! Really helpful.
I replaced the fans of my Antec Kühler 620 with two Arctic F PWM fans and found them to give good performace and low sound levels at a great price.
I found I had best results with front intake simply because cold air is being drawn through the radiator.
Nice to hear someone having good results from Intake, gonna go try it.