Im running a losi xcelorin sensorless esc it runs cool and gives me no problems, and im looking for a new 540-550 sized motor for my stampede. i run 3s theres no real price limit, i do know that medusa have closed there doors, there not selling motors anymore, i heard nothing but good things about them so thats a shame. i was running a 4800kv, getting 60MPH out of 18/90, im looking for a motor with 4000-5000kv a nice high watt high efficiency motor