I would still buy a GTX 960 if SWTOR is your main game and you're playing at 1440p or less on a single monitor (or 1080p on three monitors, it will do that too). If you get anything less than a 960, I don't think you'll notice much of an improvement, you're replacing and older mid-range card with a newer entry level card in that case, it isn't really worth doing IMHO.