organic
semi-metallic
metallic
Organic won't make noises but you'll get about 50% of the wear life on them...semi will squeak, but they'll last a good, long time and will give you very good brake response...metallic...lemme see...the only vehicle that now still has them is my 1992 BMW!

I've had those brakes forever and they're still going strong...more likely to need a rotor before pads!
The Spyder, IMHO, is best with semi-metallic...you need forceful braking and organic will not hold up!