I would also recommend the extended M-sport (black grill), especially on this car.
I like the black exterior, but not black on black but your vehicle. The leather is fine, but I actually like the Sensafin better (shocked).
I like the executive package, but agree it might be an option to leave off since the cost doesn't make sense (I have it).
Absolutely get the DAPP.
Avoid the upgraded 21s. Stick with the stock 20s (not sure where you live). You will be shopping black rims at some point anyway