I've also looked at the 42 (again without having had the chance to fire it).
Everything impressed me except (a) the extractor/ejector assembly feels like plastic and (b) the sights are awful. The first one isn't a deal-breaker for me, but the second certainly is.
If this thing could be scoped easily, I would possibly reconsider. But the sights are as much the heart of the system as the barrel is. If they suck, the whole thing sucks, yes?