Frankie Figgs

I am going to be purchasing my first Pump Shotgun in the next two weeks, and against the advice of my entire family (870 fanatics) I am looking at a Benelli Nova or Super Nova. I am looking for some advice from someone who has had experience with all 3 guns. What are the major differences between the 870, the Nova, and the Supernova, and is the Super Nova worth the extra cash? Thanks!