I bought a few of the 81s that got imported from Italian navy surplus last year, thinking I was a fool for buying guns that I'd maybe shoot once, then stick in the back of the safe to gather dust.
Instead, I ended up buying a couple thousand rounds of FMJ and a dozen mags, and have been enjoying the absolute hell out of them. They're as easy to shoot as a .22, but have enough oomph to make me feel like I'm shooting a 'real' gun. I don't think I'd ever carry them as long as I have a supply of 9mm and my 92Cs, but I do wish Beretta would upgrade the 81 series like they have the 92 series. An 81X would be really slick.