My BMW came with the Bridgestone RE050A run flat tires mounted on OE 18" sport package wheels. I replaced these with 19" wheels and the Sumitomo HTR ZIII in sizes 235/35-19 and 275/30-19.
They handle really well and offer very good dry traction. They are pretty quiet and their ride quality is good considering their profile.
Their tread life has been good as well. I have driven on them for two seasons and the rears still have a decent amount of tread left. I think that is pretty good considering I cannot rotate my tires, my car and how I drive.
They do seem to give up a little traction in the wet compared to other tires I have driven but not a lot.
Overall they are an excellent performance value when you compare their price and attributes to others in their category.