The first mod as an Xdrive car should be coils! Speed won't matter much when your car feels like rolling over at anything above 75 mph because of the jeep stance. I have an x drive, that was my first tune. Do it, do it before you get the car lol.
2011 e90 KW V1, JB4, BMS Dp, BMS Intake, CP, Alpina Flash, ISO, E85
Coming soon to the garage: 2014 M3 Maybe M5