I think im probably gonna go with serpent , not saying for sure though cause I have ALOT of K parts and i can always just get the new upgrdes except for the 777WC i would have to get the TKI3 . the motor choices are the Bonito, O.S. speed or the RB BX so far . As far as servos go either KO of stay with Futaba and continue using the BLS line.