I own the MSI Lightning GTX 770 2GB ($450) and it's a fantastic card. It's one of the higher factory OC'ed cards available and it's heatsink/fan setup are highly rated for keeping your temperatures very very cool. I've run Heaven 4.0 benchmarks at max settings and I can't get the video card to get warmer than 65 degrees Celsius even after letting it loop 4-5 times (fantastic!). You will pay a few extra bucks for it but thats because the video card is built with better quality components than most other manufactures. This is just my opinion and recommendation but I feel that once you research this video card, you'll find that I am %100 right that it's the highest rated in performance, cooling, and overclockability that you can find. Several hardware websites have reviewed and listed this video card as their Top Pick in the GTX 770 realm. Also, that Gigabyte WF3 4GB GTX 770 looks to be a great pick as well. I've read many great things about that card also. Good luck on your decision!
P.S. - This card is big, make sure you have room in your case for it!