I own the M1 Super 90. A friend of mine exposed my 13 year old son to it, much like somebody bringing a kitty home to your house and by the time you get home the kids are in love with it.
Dad has to buy the M1. It's a great shotgun. I hate to admit that anything camo and aluminum and short and ugly is a great shotgun, but it is. Now I get to borrow it and keep my walnut and blued steel preferences intact.
But it is NOT the better blaster. The Super Black Eagle is the better blaster. Because it costs more, it's the "bad boy", it's the outrageous 426 Hemi and the one I've got is the mere 440 Six Pack. So if I were somehow pinned down and forced to go buy a NEW one, I'd pick the Super Black Eagle II.
I already have dozens of nice, beautiful shotguns that shoot sensible 2 3/4 inch shells, and several of them will handle 3 inch shells. If I were on a quest for the ultimate blaster, I'd want the ulitimate blaster.
Blasters cost money. How much of a blaster do you want to buy?