either one will serve you just fine. I've got an 870 express super mag I bought when they first came out and have never had any problems whatsoever with it. from the lightest skeet loads to full blown 3.5" hevi-shot turkey loads. she just keeps booming and shucking them out. probably 10,000 rounds and counting so far. My father has had two mossy 500's as long as I can remember and cannot think of a bad thing to say about them either. flip a coin and get shooting.