Since your tossing ideas around, maybe a few more might be good.
a) 410 slugs seem to be limited in their usefulness, compared to a 20 or a 12ga.
b) 410 slug ammo is more expensive than larger slugs.
c) without checking, I think Mossberg does still make a 410. I like the safety under the thumb feature, I like the hammer under the thumb also.
d) Ya gets a lot of gun for the money with an NEF, Mossberg is a bit more.
The question is, what kind of nails are ya gonna pound with this hammer?
Woodbutcher