To be honest mate unless you can map yourself I wouldn't go with megasquirt. I would look around and see what your local mapper prefers to map and knows how to map it.

I use DTA now as megasquirt isn't that cheap any more, not like it used to be in the early 00's, it also uses or did do cheap poor quality components that had no place within a ecu, Dorn't get me wrong the megasquirt can do well but I struggled to get a couple of well reccomended rolling roads to map it as they wouldn't touch it as they said it was a DIY ecu and i could understand where they were coming from. Dodgy solder joint lets go because its been soldered together in someones bedroom and it melts a engine.