Camber isn't the tires biggest enemy. A good alignment from a reputable shop, proper tire rotation(if applicable), and not over inflating tires will preserve a majority of the tires normal life even with some negative camber. What really chews tires up is out of spec toe. Whatever springs you choose, just make sure you get your wheels toe adjustment as close to factory specs as possible.
2013 DGM 535i M-Sport