Changed my setup to 15/10 F&R respectively.
Year/model BMW:
2009 M3
Wheels/offset:
Front: 19x8.5 OEM M3, ET29
Rear: 19x9.5 OEM M3, ET23
Tire size:
Front: Michelin PS2 245/35-19
Rear: Michelin PS2 265/35-19
Suspension:
Stock springs equipped w/ EDC
Spacer size:
Front: 15mm
Rear: 10mm