anyone running UHP RUN-FLAT TIRES?
 

There's quite a few tire threads but I couldn't find anything bout ultra high performance run flat tires. Plus I'm looking for people actually riding on em in a Z or 2 seat sports car to get feedback. I don't need the tire article in car and driver. Nice article, but does nothing for the Z cuz they tested on gt and sedan type vehicles.

Right now I'm lookin at:
Michelin P/S 2 plus
Pirelli p zero nero and a/s tire
Dunlop direzza runflats
Also is anyone running those Z rated goodyear eagle runflats. They sound good but are $600 a tire. Not sure I will spend that much while in the tuning process but would like to kno if they r worth the money?
I would greatly appreciate an info on uhp run-flat tires and there performance on ur Z or comparable car. Thx in advance.
Both all season and summer tire comments would be appreciated.