Mrk, loft is actually not that important when it comes to distance, everyone is different for lofts on drivers. Its more a case of finding the right shaft that suits your swing. You really need to experiment with different lofts before you decide.

You might find that 10.5° suits you the best, remember that the lower the launch angle the quicker the ball lands unless you really bust it. Some really strong hitters use lower lofts but its becoming less common now. Phil Mickelson plays a 9.5° (or at least his 983 was I dont know about his Callaway) I believe whereas Tiger Woods uses a 7.5°.

D.