when ringing round or quotes on 4 new tyres, a number of tyre places wern't happy with my suggestion of non-runflats. Reasons being invalidating insurance (tyre spec has changed from original build) numerous mentions of no spare wheel (as if I didn't already know this!) etc.
My local dealer confirmed this and said you are really best sticking to runflats as the suspension etc is set-up different to the cars with normal tyres and you would notice a slight difference in its running.
One local tyre company wanted me to sign a declaration to prevent any 'come back' on himself.
After all this, I decided to stick with runflats and went for Dunlop Excellence x4 which I am really happy with. I don't really know what all the fuss about changing runflats is all about but then I haven't tried a mini with 'normal' tyres to compare. I am happy that I have stuck with the runflats after all, got a good deal on ebay, 4 brand new, fitted for £310, normal retail is about £100 per tyre.