what's the difference between the HD00 and HDSS clutches from act??? the price is about the same but the HDSS is about $50 more from where i'm going to buy.
also, i'm thinking about possibly getting the act XTSS or XT00, but the pressure increase is 100% over stock. would i be able to significantly feel the difference?
my car is daily driven and i dont want anything too hard to push, but if need be, i'll get it.

opinions? suggestions?

thanks guys