I also had the run-flat Dunlops (factory provided) on our 2008 535Is and just put on four new Kuhmos. They are a vast improvement over the harsh riding run-flats and I'm very pleased with their low noise level and performance. I would never by another set of run-flats. Especially since I have a spare from the factory. Why would I need them? Go with a HP radial of your chosing and don't look back.