I haven't played with the Chiappa but I don't have any love for non-GI M1 Carbines. The design of the M1 Carbine doesn't lend itself to inexpensive manufacture done right. Little known fact, the M1 Carbine was more expensive than the Garand during WWII. The GI guns are built right, non-GI guns; not so much.
Best 9mm carbine I've ever had is the Sterling Mk 6...just too much fun, never once malfunctioned on me.
I call this photo "The Boys From Dagenham".