Well the reference cards will run more loud then a non reference card. So EVGA, and PNY will be louder then something like a GALAXY card. For reference this is what the Galaxy card would probably sound like. You may want to take a look at this page as this review goes over the major cards in the 670 series. http://www.tomshardware.com/reviews/geforce-gtx-670-tes... . Now I don't know exactly what your setup is what you play and what you would like out of your games so if you could describe that and maybe I can direct you in the right direction.
I don't know if all there cards will coil whine but this coil whine would bother me.