Yes as said the rubberbumpers were to make them legal in the USA, I believe California was the prime mover. The other thing that makes the rubber bumper models less attractive the ride height was adjusted and they(MG) just inserted metal spacers to adjust. A lot of these cars have been reconverted to the pre-USA standard so watch out if you view one for dates of manufacture and re-imports. And I agree with Rob Dean, consider/drive an MX5, but also I wouldn't be seen dead in a VW Golf or for that matter any VW.
Chris.S.