I’m struggling with choosing a colour too, I’d rather have the sunroof over leather so interior will be black seats with light roof lining as standard. The green looks brilliant on the m50 with the black m styling however on the sport I don’t think it will look as good with the grey accents. Skyscraper is my favourite colour on BMW’s at the moments but I don’t think there is enough angled lines in the i4 with it being more streamlined to really show the colour off!