The current belt driven models have better chassis setups out of the box and are optimized for racetrack performance. There is lots of setup information available.
The Ofna CD3 Pro is shaft driven and can handle modern horsepower but takes a lot of work to arrive at the optimum chassis setup.
"Yellow Jacket" Mugen MTX-6, Picco Torque
TeamNITRO RC Club, Lynwood, Illinois