I hunt with a completely outfitted Mossy 835 (many barrels and many chokes!) but I evaluated many smaller, lighter shotguns for the "fortress" gun (HD) and ended up settling on the Maverick 88 (the "across the tracks" cousin to your 500.) I did this because I need the gun readily available at night, I carry my EDC on me until I go to bed, and wanted the shotgun in a Home Protection Back-Up Rack on the bed. It needed to be slick so as to not catch on any bedding and light enough to swing around handily in house. I carry fixed sight revolvers for the same reason, lightweight and no catching on anything. I can see going tactical and dressing up the shotguns for SWAT or Delta Force type things,but even street cops in cruisers prefer the clean and simple "cruiser" type guns in their cars. My Maverick is a working gun and an integral part of my home defense plan, not a show piece , so I'm afraid I have to go with KISS here. The only mod on the "House Gun" is a high vis optical bead on the front of the barrel.
The light assemblies all stick out and make the barrel nose heavy, the exact opposite of what I need in the "Bedside Pursuader."
If you are out to make the gun a showpiece, the light would be really nifty, but if you are going to use it inside a house for defense, you might want to rethink your needs. Replan your internal lighting to set up the BGs in the light and you out of the light. Nightlights can be very craftily placed to do just that.
As ole Wyatt would have probably said,it isn't being fastest that counts, it being the most accurate, FIRST! Speed requires a slick gun with no encumberances and no complicated sighting system.
