This is what I added to mine - (Exterior and Interior Silverstone);
- 20" wheels - I just prefer the look
- HK - would have liked B&O but not good value - basic BMW systems generally sound poor
- Speed limit display - works very well with the HUD
- Soft close doors - wife wanted, I like them but not essential
- heated steering wheel - wife wanted, I wasn't fussed
- Auto boot closing - wife wanted, pretty useful TBH
- Piano black trim - I liked the standard alu trim, but this lifts it up a notch IMO
- Multifunction seats - I like these a lot, but they aren't that much better than the standard ones IMO. ie both types are great
- Split fold rear seats - should be standard
- sun protection glass - I just prefer the look, and hate aftermarket tints
Considered;
- LED headlights - they are nice but for me not worth the premium over Xenons
- B&O - I usually go for the best Hifi I can get, but it was about £1.5k too much IMO
Not interested in;
Surround view - heard good things but not fussed
Ceramic brakes - the car won't ever see a track
Internet - gimmick that I'd never use