You're best off doing your own research, most of the people on forums are going to tell you to go with whatever brand they usually buy. In reality there's no pros and cons, each card is essentially the same with about the same specs. It comes down to what company do you prefer. I've typically bought EVGA cards but I also like ASUS. On top of that there are several models and you didn't specify one, so are you looking at GTX 770's, GTX 550's, GTX 690's, GTX 780's, a Titan, or GTX 680's? The differences between each manufacture's models of different cards are so very different. Basically pick a particular model then check reviews between the different manufacturers. You'll likely find that there is little to no difference.