well, that depends completely one what sort of setup you are using. If you're running something like the tekno rc kit and maintaining the stock mech brakes, then yes, the 3.3 tranny is nice to have. If you're using the RCM mount and locking in 2nd, then the mechanical brakes are of no use to you.
First a quick intro since this is my first post...
I've been a long time lurker and have finally decided to do an e-revo conversion.
@83gt: Why do the mechanical brakes become useless if you are locked in 2nd gear? It seems like it wouldnt matter what gear you are in or running, the mech brakes are still gonna work.
TIA