The 11-87 is 99.9% 1100. Fit is identical. If I needed 2-3/4" and 3" capability in one gun I would go for an 11-87. Actually, I would look for a used 1100 G3 or an older 11-87 Premier for the bluing and wood, but if that doesn't matter to you an 11-87 Sportsman should fill the bill.
I have used the Steel Shot barrel for many years now and love it. Used to have it on a 2-3/4" gun, now it's on a Magnum receiver.