The MMM is fine generally, and even if it isnt, their service is fine (you can always get the original owner to send it in for servicing if needs be
)
I would strongly suggest the MMM as the electrical setup, a nice RCM motor mount and battery tray, and then just add you own radio gear and some nice Zippy or RCM lipos in your desired flavour or voltage (blue zippy-H 20-30c 5000mah lipos are great).