Sorry stepped out for a bit. cst1992 is spot on. The price of the 770 is pretty good right now in comparison to the 760 and you get a pretty good performance upgrade. For brands Asus, and EVGA are good, MSI seems to have a few more DOA style reviews but I personally haven't had issues with them, it happens. They do have great cooling though. The EVGA with the ACX cooler seems to be one of the best options out right now.
Another good thing is if you pick up a MB that's Sli ready, then down the road you can just add in another if you start to bottleneck, although i don't see that being a issue in the near future at all.