Im trying to decide if I should buy another Gigabyte 7870 OC for crossfire or if I should get a single 7950??? Playing mainly games like BF3 Borderlands 2 and Tomb Raider at the moment but getting geared up for BF4 and Watchdogs... Could sell the 7870 and use it towards the 7950 which is a great help money wise or just spend 250 for another 7870???