Four years ago, I completed my build and installed a set of Bridgestone Potenza RE-760 Sports. The fronts are 245/45 R17's and the backs are 275/40 R17's. After 1,000's of highway miles, many HPDE road course events, and a couple of Autocross events, it's time to start thinking about replacement. I have been happy with the Bridgestones, especially the quiet comfortable ride on the highway and predictable performance at the track. My skill level at the track has improved (slightly) and I would like a replacement tire that gives me good highway performance while allowing a little more aggressive driving at the track. Any ideas?