You might want to take a look at the Stoeger M2000 or M3500. The 3500 just came out and they are both auto loaders, The M3500 has had awesome reviews and it also shoots 3.5" shells if you plan on turkey or duck/goose hunt.
I just got a Stoeger M3500 and am in love with it! It also has the exact same inertia system as the $$$$ Benelli autos. Once you move on to an auto loader you will not want to ever use a pump again, at least thats the way I feel. I got my M3500 for $550 and was also looking at the Super Nova but for the same price as an auto loader and the great reviews on the gun the choice was easy.