I don't know the Rizzini sxs from having my hands on it. But from a standpoint of price, I think your comparison should probably be to an AyA #2 sidelock as a somewhat more expensive gun and to a 4/53 boxlock as a slightly less expensive gun. Cabela's had a proprietary version of the 4/53, coin finished receiver with more engraving and somewhat nicer wood (IMO) than the standard 4/53, that might be the closest comparable AyA model. Sight unseen in the case of the Rizzini (other than photos), I think I'd take a very high condition Parker Reproduction 28ga over any of those other guns.
