Recently I've been needing to get a brushless system for my B4, so that i could keep up with the fast guys. So I've researched and been deciding on a pair of two ESC combos, but want to know which one is better. Both are Team Losi Xcelorin Series.

1) 7500kv sensorless esc combo-$115
2) 13.5t sensored esc combo-$145

All i need to know is your guys opinion on which combo would be right for me using a 7.2v 3800mah 35c battery. I know what is the difference between kv and turns, but before I spend over $100 on a esc and motor, I would like to know which i would enjoy the most.

Also, if i wanted to put a sensored 17.5 motor on a sensorless esc, what would be the difference in performance if i had a sensored esc on it?

Thanks for your time, and I appreciate all advice!