Hey everyone...I am looking to pick up a friend for my G23. Right now, I am considering a Remington 870 Express or a Mossberg 590a1. Does anyone or perhaps someone you know have one or both of these? If so, any recommendations or problems to report? For instance, I have heard of some 870 owners having significant rust issues. I have done a fair amount of research on each, but wanted to get some opinions.