I just bought a Hyper 212 EVO for my PC because it is FRIGGIN loud!
ex: my mom: "Chris turn off your a/c"
Me "It is off.. thats my pc D:"
Any way i want It because it is more quite. My question is would i be worth it to add two NF-P12 (with or with out the PWM modle) or would i just be wasting money?
Yes, the 212 with a couple of Noctua fans is a good combination. If your temperatures are good, you might consider some fan control software, to reduce the noise. It's worth trying the latter, before purchasing some new fans.
I run a hyper 212 evo with 2 NF-F12 fans, it works pretty well but if you are going use Noctua fans I recommend getting the NF-F12 fans for their much higher static pressure
Save your money and just get one nf-p12 ... push pull will only drop temps by a few degrees and based off the price of the Noctuas I don't think its worth it to get two.