Depends on what you mean by best?
For me 4x4 on modern lipo batteries with brushless motors is hard to beat in terms of speed and run time. 4x4 harnesses the power means you don't need a high grip smooth surface.
The noise of Nitro can cause social issues.
M05 Racer(retired) FF03 Racer - Brushless Hyper 7 Basher