do you need both barrels?
If want to go deer hunting with the slug barrel then it looks like an ok deal as long as the scope is a quality brand (bushnell, burris, etc.). if you don't think you will ever use the slug barrel, then I would just go for a normal 500. I picked a 500 12 ga. up 3 years ago from wal mart (emergency buy while on a pheasant hunting trip, because my firing pin broke on my 11-87 and the local gunsmith wanted a fortune to fix it) for about 250. The mossbergs are good "cheap" shotguns that you won't have to worry about throwing under or behind the pickup seat unlike an $800 11-87. I have not had any problems with mine and I abuse it a lot. They seem to make them a bit better then the remington 870's in the same price range.