What a great opportunity CliveN. Get the one that you want - its your car and go have fun. I drove a Z8 ~15 years ago when my friend (a local BMW GM), had one that was traded in at his store and brought it around for me to drive. He was great - told me he had to put new tires on it anyway, so. "treat it like a rental car'" I did and did a few burnouts - in know sacrilege, but oh what fun! It was a really fun car to drive and quite quick. It is was fueled my desire for the 6MT Z4 that I just recently bought.