Dear 001,
Got a little tidbit for you. One of the Mazda Canada guys at the Toronto Auto show told me they are coming out with a retractable hard top, to be announced about June this year with deliveries starting probably in August. Estimated cost is $1500. Canadian (probably about $1000. U.S.) It will be in keeping with Mazda's philosophy of lightness so expected weight gain is minimal.
Regards,
Walt