id just add the 360 m8 to be honest if nothing wrong with the 240

I think the ax is poverty spec compared to the rx,
ok i see now! Its definitely the rx route for me then,I have the rx v2 240,i want to add the rx 360 to the roof ,would i be better off replacing my rx240 v2 with a rx240 v3 and getting a rx 360 v3 for the roof,or just add a rx v3 360 and keep my current rx 240 v2?