I've not tried the Dunlop SP01. But i had the Pirelli Euforia runflats on my first MINI, and had the Dunlop SP9000 DSST runflats on my current MINI. Personally i found the Dunlops were superior in every way to the Pirelli's

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Another runflat you might want to consider are the Kumho ECSTA SPT KU31 runflats. There the cheapest runflat on the market. See below how they compare performance wise
http://www.1010tires.com/tirecompare...e=1&prevpage=1