Well personally I stick with 60D tires. The pits if they last longer than the S and M grips are worth a shot in my book. I go through a set of fronts in about 4 days of racing (1 month) and a set of rears in about in about 12 (3 months). I normally use which ever rims my LHS has when it comes for new tire but they usually end up being the swift rims or the 11 spoke ones, So that is a common.
This is good stuff and thank you much Grandpa for sharing.
Jason