[Arkay402]

Great posts on this topic, looking forward to seeing the car after the tantalizing descriptions.

The thing that worries me is: is BMW again adding weight and complexity to a concept that began as a light and simple roadster?

While the Miata has added a hard convertible top, I think it's kept the cloth top as an option?

I used to have an '04 SL500 and while that hard top was a paragon of engineering and vision, it was also a candidate for the Jenny Craig diet given the number of motors that were whirring away as the top opened and closed.

Plus I just don't see the concept of a weighty hard folding top suitable for a sporting roadster - a luxury car like the SL yes, but not for a Z4.

The one thing I've always admired Porsche is their dedication to keeping the curb weight animal in check...even if it's still creeping up with each consecutive generation. Looks like possibly another Boxster S for me next year...