I don't think a 3k premium is worth it. For the money in th UK you could get a Golf R32, or the highly rated Audi S3. You could even nearly get the New Impreza STi if that sort of thing is your cup of tea. I suppose with any of these though your gonna be stung with large depreciation out of the showroom. Really though, unless you can live with a hatchback JCW it looks like you are going to have to look elsewhere.
It really is beyond belief that a company of Minis size cant manufacture a rear bumper in a couple of months! Its really a complete shambles.