Do you already own one? Do you really want other's opinions? Here's mine. These guns are okay. There have been some issues with RBLs holding up under heavy shooting. Not all of them, but more than I would have expected. I go to a lot of sxs shoots in the Midwest and see a few RBLs, but have never seen a Sporting model. A friend has a 32" 12 gauge for water fowling. It is HUGE!!! His goes over 9# and is quite muzzle heavy. In my way of thinking the CSMC Sporting model is the antithesis of a fun to shoot sxs. It's heavy, has a high ventilated rib and, god forbid, an adjustable comb. You see very, very few guns so configured among sxs shooters. Most SxS shoots don't have long targets where a big, heavy gun is an aid to good shooting. These guns go for $7k and up. For that much money you can buy a Winchester 21 and have a classic that will stand up to heavy shooting and handle better than the CSMC. Another American Classic that will eat recoil, stand up to a lot of shooting and handle well is a Fox.

This is my 30" AE with a new butt stock that is less than half of a CSMC. My 32" L.C. Long Range is set up to shoot big targets. With a glass bedded stock head it can take a bit of shooting and I have thousands and thousands of rounds through it.

If you want the ultimate classy big target SxS get an English pigeon or waterfowl gun. If you must have a big, new gun that you can shoot the bejesus out of buy a Perazzi DC12. I recently got to handle a 32" 12 gauge and it is, without question, the ultimate big sxs target gun as it has that fabulous Perazzi feel. It handles and moves like it weighs a pound less than it does. And their reputation for durability is legend. There are only 15,000 reasons preventing me from owning one. I hope you enjoy whatever you get and you shoot it a lot.
Oh, I would not want to depend on a Turkish gun like the SKB for lots of shooting. Been there, done that.
Regards
Jeff