Those Forgiatos are very nice for a 750, but in my opinion the Alpina wheels are perfection and are also a defining characteristic of the vehicle. I would personally not change them.
I do agree that the roof spoiler would be a nice upgrade. I would go gloss black roof spoiler with the gloss black roof.
In the end what really matters is that you find your car aesthetically pleasing. When you are walking away from your car and you can't help but turn around and look back every time you know you have done the right thing!
2014 Carrera 2S
- White/2 Tone Espresso/Cognac - Aerokit - PSE - PDCC - SPASM - PDK - Sport Chrono - 20" wheels w/OEM Spacers - Glass Roof - Leather Dash - way too much more to list
2013 E92 M3
- LeMans Blue/Black Novillo - Comp Package - MDCT - CW - PP - EPS - CF Roof w/OEM CF Mirrors, Spoiler, Interior Trim - Full IND package - Muffler Delete
2013 F12 M6
- Alpine White/Black Merino - Executive - LEDs - B&O - DA - Lots more