Ant,
Lately it seems if there isn't a "typical" ERA. The cars that we finish here are a fairly even mix of Toploader, Tremec TKO and Richmond.
Frankly, when I drive a car, I drive it very gently. No slamming of gears, etc. (More interested in listening for things that might be awry, and getting a feel for how the car handles on the road.)
They all seem to shift OK to me.
I'm told that the Richmond Gear needs some miles to break in the shifting. For a street and track combo, the R.G. is probably the best, but the TKO II with the .83 fifth would be a slightly wider-ratio alternative.
The basic prices are similar, but the R.G. also requires $300+ of shift linkage.