My vote is EVGA 770 with ACX. Mine has been super quiet and very cool. Playing games like Far Cry 3, BF3, and even running Heaven 4.0 Benchmarks I've yet to go over 70C @ 100% GPU usage.
The Gigabyte card noobmcwafz mentioned has gotten good reviews as well. But it's an inch longer than the EVGA card (10" EVGA / 11" Gigabyte). So make sure your case has room for either card.
Between EVGA and Galaxy though... hands down EVGA.