I would pick up as many rifles as you can in person.

I like the looks of the others better but currently have the k-gun. It fit the best and together with the weighted stock it feels surprisingly good in the recoil department. Had the Chaupis in 9.3 from Kebco (great guy to deal with by the way), but it was a wee bit light for me. I think their 470s are quite nice. Im giving a second Chapuis a chance in a 12 bore slug gun as I recently moved to a predominately slug-only state. Should be fun.