Putting new tires on my 16 R1S. Have 600 miles on it with one trackday. Didn't get good vibes from the S21s, especially the front, felt very vague. So I'm stepping up to newer stickier rubber. I do half of my miles on track, and hardly any commuting, just twisties. I'm choosing between Pirelli Diablo Supercorsa SP in 190 or 200, or the new Michelin Power RS in 190 or 200. I love the feeling of the old Pirellis i used to run on my R6, but loved the durability of Michelin Power 3's that I ran last. And not sure what the different sizes offer. Knowledge would be appreciated.