DBBill
The 9,3x74R is an excellent calibre. I have been using my Chapuis double for the past 5 years. I have taken several deer and wild pigs, as well as 5 coyotes, a bobcat, several turkeys and a black bear. I suggest you look at several different brands and pick the one you like the best.
Besure and have Quick Detach scope mounts fitted. A scope really adds to the "huntability" of your double.