I've used the Supercorsa's (sc1 front and sc2 rear) to race on the 996 with no issues however, I do prefer the R10's. They seem a tad more stable but with the same grip as the Supercorsa's and are a bit cheaper then the Pirelli's.
IMO the Dunlop's are to expensive for trackdays.
Yer pay yer money etc.................
