What kind of tire are you looking for? Performance, all-season, etc? I have the Kumho Ecsta SPTs and have no complaints. They're good for a street tire but if you get into tracking or spirited mountains runs or whatnot I think you'd find them a little lacking. Performance-wise a lot of people swear by the Falken Azenis RT-615s although the design is a little aged. Along the same lines are the Hankook R-S2s but of course with both of these your treadware is going to suffer. If you're looking for just high-performance or all-seasons however there are just too many options to list.