I'm planning on putting a Scorpion 3020-12 in mine (I already bought it for a DWFoamies 55" YAK that I did not end up buying) - looks like it's good for about 600 watts on 3S with a 13x8, or 800 watts on a 4S with a smaller prop. I already got the surprisingly-expensive HS-65MG's that are recommended by scouring Ebay for suitable auctions. Not sure about the ESC yet - I have been using Mystery 80A ESC's with no problems.