With the miles I'm putting on mine and the frequency I drive with the top down it won't be much of a collectors item. It doesn't matter ... I bought it to drive ... and it sure gets driven.
On a side note, even with the agressive driving I do the Conti Sport tires are in really good shape for 10k miles ... they probably have another 10k in them. My Bridgestones on the Z4 3.0i were only good for about 10k miles.