+1 for the waiting, however theres a few simple things that in my mind are "must do's"
1. tint the windows
2. get rid of as much amber lenses as possible
3. take and dealer garbage off (lisence plate frames, stickers on the
4. take off the 530i badge on the back (some people like to leave
them on but IMO all bimmers look better without them)
i think if you start with these simple things then it will stand out and just be slightly cleaner looking and different from the herd, then go from there