I would just go OEM on the rotors.

Replace the sensors. First reason is they get hard from the heat. Second reason is you don't know if they have tripped. There are two steps in the E70 sensor. First step is used to calculate remaining pad life, supplementing the algorithm in the computer. Second step turns on the warning light near the end of life. You have likely gone through the first step, even if you haven't gone through the second step.

Background here: http://www.xoutpost.com/bmw-sav-foru...ry-bypass.html

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue