Need help picking out a bl set up.

Hi all. I am currently looking into buying a new brushless set. I am currently running a ss5800 system in my losi mf1. I will be runnig with a 8000mah 7.4v lipo battery. Should I go with a sensorless or sensored system. I will be doing mains that are 10 min long. If PAPA see's this he will know what track I am racing on. I am looking for more rpm and torque. I have a buget of around $200.00.


Thanks,
David