Thanks for all the comments and advice.
It is a new car, and I will check for the shipping blocks, although I wouldn't say my ride was brutal. It felt fine the other day when I overtook 2 cars and a truck at 150kmh, but I don't think there's much future in going 50% over the speed limit. It was the first time I put the foot down and was shocked when I saw the clock.
Not test driving it wasn't the best move. I'd been fascinated with BMW's since I was young and just assumed I would love what many think is the ultimate bimmer. I don't think I bought the wrong car, I just need to win the lottery and build some decent roads around here. You can't go 50 metres without dodging potholes and patchwork.
I will probably go for the 18" wheels, which brands are the best? I think I will keep the 19's and track this car someday, hopefully I don't wet my panties