Personally, I would look into something different for 13.5T touring car racing than either the sport or the sprint. Something like a Sakura XI Sport or the Sakura Zero S (now available as Turnigy TD 10 from Hobbyking) or see if you can get a good deal on a Durango DETC410 or something like that. IMHO you'll have more fun in racing one of these in the long term.