Thanks for everyone's replies it turned into an interesting topic, just as an update I took Mrs Z to have a look at a Z4 which to be fair wasn't the best example and for various reasons neither of us were won over, so I've decided to keep the Z3 until the itch needs scratching again.
So I thought I'd do a few little mods in the meantime, I've retrofitted some seat heaters, done the seat lift mod plus a few other odds and ends. I must admit the seat tilt and heaters are worth every penny, looking forward to some sunny winter topless driving
Thanks again
Keith