Ok I have a Mossberg Maverick 88. It is the same as the model 500 series. The only difference between the 2 are the areas where the safeties are. The 500 series has it on the trigger guard, and the Maverick have on the top. I also have a Remington 870 Police series that I picked up from my friendly gun shop recently for half of a new one was. The 870 needs a little work( slide is a little loose) which a competent smith should be able to tighten up.
I just saw the Norinco the other day and like it. It made be after the ban, but it apparently never has been fired, I took my bore light and mirror!!
Benelli's make a nice shotgun, and they are the only that I know that has a button to pop the round out the chamber with out having to unload the whole gun