nova/p350 differences?

[Bigfug]

What is the difference between the 2? Locally the p350 is 50 dollars cheaper than the nova and has more options to choose from. I am also considering the remington 870 for the money. I would love to buy the nova but considering barrel availabilty the remington seems more attractive. My other option would just to purchase multiple nova's as they are only cheaper or close to the same price as the barrel itself(start at 299 locally or 249 for the p350). Ideally I want a barrel for self defense, a slug barrel, and a 28 in barrel that would serve double duty for all types of clay and bird hunting. Opinions?