Create a poll and let the forums decide
. As you can see from my avatar, you know what camp I am in. Their are a number of reasons why I personally chose the M500 over the M870
Slide Release location
Doesn't have that "flapper" shell elevator. Tired of getting my fingers pinched.
Feels better in MY hands.
Built to last
The 870 seems to have dropped in quality from what I have seen in the last couple of years.