If you are comfortable without runflats, go with the Vredestein SUV ultac sessanta. Great, great tire. I ordered them through RDP motorsports, as mentioned in this thread (
http://www.camaro5.com/forums/showthread.php?t=145060), posed as a camaro owner, took a long hot shower, and replaced all four tires for 985 delivered. They handle awesome on the dry and are supposed to be one of the best rain tires on the market. And they are symmetric, so they can be flipped side to side. Perhaps the greatest thing about them is ride quality. Greatly improved over the runflats.
If you don't have a spare tire kit, buy one, buy a AAA membership, send me $100 for the great advice, and still put $750 in your pocket versus the cost of the run flats you are looking at.
You are welcome.