Pete, I can't speak to Bridgestone, but I recently replaced my Goodyear Run Flats on my 657hp ZO6 with a set of Nittos. All I can say is “WOW”, what a difference! Granted, I only have a few hundred miles on the Nittos but they are about 80% sticky-er tire and I no longer go sideways on launch and shift! They ride about the same (or maybe slightly better) as the Goodyear but are definitely a lot quieter.
Pete, you may want to check out “Discount Tire Direct”; the prices are very competitive with Tire Rack and you can read some helpful user reviews. Discount Tire Direct also has a great telephone Customer Service department. The C.S rep. honestly told me that the only downside to the Nitto was that the life of the tire would only be about 30% of that of my Goodyears. For the price difference, I figured that was no big deal.
Good luck!
Jim