I think Im going to go with the Stoeger 3020. Its super light and is Inertia Driven so has minimal kick. Thanks for all the suggestions, Im sure he will be over the moon excited when he gets his hands on it.
If it matters, I can tell you from experience that inertia shotguns typically have more felt recoil than a gas shotgun of similar weight. And a lighter shotgun tends to have more recoil than a heavier shotgun.
Keep in mind that every new release of Stoeger auto shotguns has had teething problems. And the 3020 hasn't been out long enough to baseline the reliability of that shotgun. I've shot one and taken it apart and it's basically a slightly scaled down version of the M3000 with the same build quality and plastic furniture.
I've seen examples of used Montefeltro 20s with walnut furniture for significantly less than a grand, around $700 on the low end. It's one of the few auto 20s that can be had with both a youth stock and a full size stock and that you could potentially buy, shoot, and sell for as much or more than what you paid for it. It is a heck of a lot of shotgun for the money with a known level of reliability.
If it were my son, I know which shotgun he'd be getting