Recommend a barrel for a Rem 1100 please

I have this 1100 (it's really my dads, but I have it in my possession). I think it's an early 70's gun. It's a 12 gauge with a 22" barrel and a gunsmith threaded it for screw in chokes. Trouble is the thread pattern he used doesn't match any of the manufacturers. I'm debating on buying a new barrel in either 26", 28", or 30". The 30 looks like the least attractive, but I'm not really much of a shotgun guy. This gun will not see heavy use, as I don't use a shotgun much. It would be a general use gun. Informal (very informal) skeet/sporting clays, little duck hunting. Wood ducks. Possibly deer hunting. Maybe squirrels. Hopefully not rabbits, because I don't like the idea of 12 gauge for rabbits. It could possibly get used for any South Louisiana hunting, just not heavy use.