One of my bosses - actually one of my boss' bosses - told me to never, EVER go with the cheapest option, and I took his advice to heart. Every time I have strayed, I have taken one in the 'nads (though with varying degrees of kinetic energy).
The "basic LE/MIL" Supernova - the one with the trad stock and open sights - seems to me to be a better answer than any equivalent Mossberg, but Supernovas are not real common around here except in sporting guise... a "tactical" one is like the proverbial set of teeth in a chicken's beak.