We have just changed our rules in NZ for NZRCA sanctioned comps. Now we only have 3 touring classes:
Stock (silver can)
Pro Stock (13.5 turn)
Mod (open)
This looks promising to be a good spread of power and openess for people to get into a class they can afdford and is at their level.
We also have Mini etc etc, but touring is the most popular.