I'm just getting into giant scale. I've bought a Matt Chapman 580 1/3 scale and am putting a BME 110 extreme in it. Question, what type of on/off switch is recommended?

any kind of heavy duty switch will be fine, I like the JR HD charge jack switch, MPI, smart fly, etc.

I use the "smart"MPI the one with the battery check lights, Just personal preference, easy to see if the plane is on or off and when red appears you know it's time to visit the battery filling station. But as RB stated any HD switch will do.