OHLINS MAS-MI00S1 Road & Track Coilover Suspension for Mazda RX8 (Series 1 & 2, 2003-2012)
if you want it to handle the best possible on the street without it being harsh it's the way to go. It or Bilstein are the only thing I recommend for coil-overs other than pure race shocks. The B16/PSS9 is the only other one I'd recommend, but if you can afford it the nod goes to hlins.