I would be buying a A10 for hunting with some use as a clays gun. I'm a big fan of the 20g and shoot sporting clays regularly with a 32" Browing 525 20g. At 7 lbs even and very forward balanced, it's the most "natural" shooting gun I have. I just shoot this combination of weight and balance so well, it feels like I'm cheating if I take it pheasant hunting.
So, my choice would include a 32" bbl and probably a 28" bbl as a set for quail.
If you're wondering, I'm a very average 5' 10" or was before I got married and beat down.