I'd say it is well worth the money especially since it isn't very expensive to start. I shot the gun and liked how it felt. I wasn't crazy about how loose the forestock is but it was fast to pump and they may be connected.
The advantage of the supernova over the standard nova is the ability to change out stock configs, which allowed Benelli to put comfort-tech on the supernova. The recoil reduction of comfort-tech is worth the price of the supernova if you intend to shoot a lot of 3.5" shells.
A friend of mine has a nova he thinks is the best thing since sliced bread. Anyway, he and one of his friends went duck hunting this past winter. His friend had an 870. Well his friends 870 ended up freezeing tight. He couldn't shoot a thing. My buddy kept shooting till he had his limit then handed it to his friend so he could his limit.
I've spent countless hours either on my hands and knees or bent over, messing up my back, looking for blood. One such instance I remember most was a hog hunt a few years ago in Mississippi. I had never shot a hog so when I poked a hole in this guy; I was determined to find him. Wearing snake leggings, I crawled on my hands and knees through the briars and the brambles and bushes where a rabbit wouldn't go. I found a spot of blood here and there but never the pig. And lucky for me, I didn't find...