Definetly the M2.

It is essentially an SBE but with out some of the extras like 3.5 inch capeablilty. They both use the same inertia operated action with all the same parts. They both have the comfortech system. They both can be adjusted for cast and drop with the use of the provided shims. The only major difference between the two is the way in which the receivers are made.

I am not particularly fond of plastic shotguns and that is exactly what the nova is.