jmir.. i looked at the motors. you cant beat those prices but you get what you pay for.. if i had to go with those set ups i would choose the 3800kv combo. its speced to 20amps/and its speced to run 12x6 props. im sure it would probally give you more performance than stock but less performance than what im running. with out having run there set ups i cant be sure. based on specs though performance will be less than my set up/but more than your current set up.