As a couple have said if you're serious about trackdays i'd go for a set of r888's for sure, having used both the difference is massive! I finished off a set of t1r's at an airfield day the other month and they coped with that but on a proper track aren't really up to the job imo. Normal tyres go off so quickly too when pushing hard, in fairness if you're not likely to push on hard you may well get on OK with a normal road tyre.