The SO4 is an older model - only the 5, 6, and the 10 are made now. Possibly the SO9, but they aren't shown on BUSA's site.

The retail price is an issue (though I've seen a used SSO6EELL for abt. $25K, that's a big hit) but I'm working on a defense contract in Iraq and I'd like to reward myself. I can't afford a British gun (new anyway) and Spain and Turkey aren't what I'm looking for. Plus I like dealing with the Beretta Gallery. I won't have some local gunsmith work on a gun that expensive.