The Mosquito has zinc in the slide. I'd be really curious to know if that really causes problems long term.
Have a look at the Beretta NEOS. I've been very happy with mine.
Or there's always the revolver route. I'm partial to revolvers and I love the S&W 34 I picked up used a couple months ago. It cost more than a new bottom-feeder but it was worth it even before I got my wife to shoot it the other day.
Or in the SA revolver arena, I was very tempted by a Ruger New Bearcat the other day. I just bought a reloading press so I had to resist. Nice looking gun, though.