You guys know me and my love for N tires. I have been using Bridgestone tires on the turbo for a couple of sets now and one of he best features is the rain traction. I can set the turbo into sport mode even and just stand on th gas from a stop. The car slips for about six inches and then just goes with no wheel spin. Never any issues around corners in the rain. They are not all season like on my 997 c2 but rather ultra high performance summer tires (which I use all year around here in Kansas).  No problems.  Just go to tire rack and take a look at the sizes which fit. I always look at the load rating of the rear tires to make certain they meet or exceed the NSpec load ratings. I have never experienced poor or strange handling with non N tires but of course I don't drive 200mph either.