Get the Bmw assist you don`t need a cell signal to use it. It comes with tech package or you can order it as a stand alone option.
You got a bigger idrive screen and a better idrive control know with tech package. The wide screen gives the option of split screen, you can see two things on the same time. It won`t worth $3100 but here is a reason to get it
Modern line imperial blue/oyster, ZPP, ZCW, ZDH, ZLP, ZTP, Harman Kardon, park distance, High beam assist, Sundahes