I've been selling my rifles and getting slug guns,I have the rem 870 fully rifled cantilever,just sold a 11-87 fully rifled to friend he used it last year and would not give it back,savage bolt action 110 slug gun and now a benelli slug gun,out of the ones you picked i would buy the 870 pump as it gives you a fast reliable back up shot both you have there are very accurate,you could get another barrel later and as people sugested use for whatever,the remy again would be my choice,just for the fact of repeatability.