I shoot a number of Benelli shotguns, including a Nova. All pattern well but some like to be clean and others slightly fouled. They all have different personalities. All throw more even pattens with #6 shot than with #5 shot but properly choked they do just fine with the #5s as well.
I only shoot 3.5" shells when doing some type of evaluation and find that 3" shells do all that's needed to cleanly kill a turkey.
The Bone Collector is a choke that hunters seem to have just "discovered" in the last few months, just as those chokes have become increasingly hard to find. Frankly, it's an excellent design that throws very good patterns with a variety of shells, including the WLBs. It would have to be one of my choices with that gun.
Whatever you choose, best of luck to you this season.
Thanks,
Clark