Thanks for all the advice, I certainly have some things to think about before I go and buy a mossberg 590. I really appreciate your time. I think I will ultimately go with the basic mossberg 590A1 with the 18.5 barrel and modify it over time.
i second that, i also would like to see a removable breacher tube and barrels that mount to the extension tube like other brands do (meaning that its a clamp instead of a fixed setup where to get a different extension tube you need to get a different barrel)