I've opted for the debadge purely because of the cleaner look. I'm fully aware that anyone who knows what they're looking for knows my car is a 520d and not a 535d. And anyone who doesn't know what they're looking for wouldn't care anyway. To suggest we're posers is a little harsh.
Re: the Nurburgring stickers. Now that I'm fairly sure is abused! Some of the cars around my way with the sticker would barely make it to the end of the road, never mind half way across Europe! In fact these ones make me chuckle...
