Your Q uis probably in wrong forum...if you look in the electrics section I am sure you are bound to find your answer and much debate.
Sensored setup is the racer choice and popular. It provides smoother acceleration and can aid control. It probably places less stress on the motor aswell. Top range motor and speedo (e.g. LRP, speed passion) have these features as standard.
Sensorless is great for bashing (i.e. not comp racing). Companies like EZrun and hobbywing sell combo packs like this. They are cheaper.
Hope this helps and good luck!
Naushad
