I think Contours will still have a strong following for the next several years.. The last V6 Taurus SHO is 10 years old now, and it's getting hard to find them in good shape anymore. 3-series BMWs and Nissan Maximas are more expensive to buy and fix, and are hard to come by in the Midwest.
I had a Thunderbird Turbo Coupe; mine was an '88 which was the last year for them. They still have a very strong following. There are two large forums for them (turboford.org and turbotbird.org), and they organize a convoy to the Carlisle Ford show every year.
