Hemitronix vs Megasquirt $

I'm really fighting myself on this one. One of the things I really appreciate about AC (Hemitronix) is that I can basically buy a "package"...cam, springs, and Hemitronix...and because they have the Dyno, etc already there, I can get it with what ahould be an "optimum" set up for me. This SHOULD allow me to put it together and just run it...

My original basis or motivation for using the MS was expense, or lack thereof, but by the time I purchase the stuff it DOESN'T come with, the little bit I do save will be eaten up in time figuring out the tuning, or am I overthinking this?