M5 David - a good number of years ago now before low profiles became all the rage. A very interesting day. Every car in the then BMW (with some customised ones too) line up was available to drive bar one which was a basic 5 series diesel driven by a professional race driver. The most sobering thing was the way that basic diesel went past all the more powerful cars. I learned two things that day
1) Equipment is no substitute for skill
2) I will never make a race driver
Great fun and having a race driver in the passenger seat to coach me and get lap times up was very illuminating - I learned a great deal on the circuit and more on the skid pan.
My Outlander came with 18" alloys with low profiles. I have put 16" steels on to replace them with some decent tyres having mullahed one of the alloys in a pot hole on the road - cost a fortune to replace. Round here, good grip and hub strength trumps pretty every time