I would say 10.5Turn brushless with no esc timing, any more and you will strip diff cogs and break drive shafts and strip spur gears too often
Its a low grade car.
If money is not an option get a higher end Touring car that car handle some real power.
Like a Team Associated TC5 or TC6 or TC6.1 . there are heaps of others but Team Associated's are cheap to buy and cheap for parts. try Tower hobbies for parts, but look around for the car if on a budget.
Team Durango - Speed Passion - Gens Ace