You can seldom go wrong with the Ithaca 37, Remington 870, or Winchester Model 12.
If you shoot factory ammo, 16 gauge is more expensive to shoot than 12 or 20, as it is less common/popular, and there are fewer factory ammo options. I have a couple of Remingtons in 16 gauge, a 1960s vintage 1100 and a 2007 limited run 870 Express.
