I also think Mossberg makes great shotguns, I have nicer shotguns than my Mossy now but I still take most of the scattergun game with it. It was my first hunting gun, and will be in use for a long time to come.
But, Marlin is the first name in leverguns as far as I'm concerned. I have an 1895G and can't say a bad thing about it. I believe they all ship with a swap-able hammer or hammer extension to make it that much easier to put a scope on top too.