Does it really matter what "ASC" recommends? If ASC recommended you got a Vegas hooker with no left leg and 2 fingers on her right hand would you go get one?
You'll find countless threads about the KA M4 and even more people in those threads saying "Great gun, go get it" that should be a solid indicator as to the quality of the gun out of the box.
You don't see many (if any) threads where people rave and carry on about how great their ECHO 1 M4s are, this should be another solid indicator.
At the end of the day, it doesn't matter what ASC recommends. You'll end up going out and getting whatever you want.