A while back I posted about dumping my stock GY run flats and put a set of non run flat GY GS D3s on my '01 vert. I did this for a couple of reasons. I had about 10k miles on my run flats, but I also had run a few autocrosses with them. After that type of use, I just could not stand the howling noise that they made. So, I decided to get rid of them. I did a lot of looking, especially on the Tire Rack site. I wanted a tire that performed better, was quieter, and gave a better ride. These pararmeters pointed me to the GS D3s. But I was not sure whether I wanted to give up the run flat technology.
After talking with a number of people that have made this change, I was leaning toward the non run flats. I had a conversation with my Vette mechanic here in Maryland and he did not think the non run flat tires would be a problem for me. He pointed out to me that my pressure sensors give me a warning when the tire pressure hits around 25 pounds. That should be more than sufficient time to get the car pulled over. He also recommended that I also purchased a kit from Tire Rack that is a compressor with an integrated tire sealant. This tire sealant is supposed to be compatible with the pressure sensors. With the proper use of the compressor and the tire sealant, you should be able to get the car to a place to have the tire repaired. He also reminded me that this would be putting a system on my vert that is similar to the system that the factory provides for the Z06s.
So, that is why I abandoned the run flats. I get a more aggressive handling tire in both the dry and the wet, plus our '01 Vert is a much more comfortable cruising car now! Plus the compressor is a handy item in the trunk. Just my opinion!
Good luck with your Kumhos!