BFG and EVGA are really clode EVGA "suposedly" covers OCing and HSF replacing aslong as its set back to normal with the original HSF when you RMA it. The Step up program is nice as well 3 months of being able to pay the difference between what you payed and the MSRP of the new card, you can do only once a purchase so you can't step up the step up.
BFG good overclocks, and Lifetime warranty, They are a great company in those regards. Honestly with the problems with artifacts on the EVGAs due to the Delta clocks, I would probably recommend the BFG anyways. Plus the Game only makes it better.