CSMC sells and makes some excellent shotguns. However unless you just have to have something different than anyone else, buy a Perazzi. Repeatedly tested and proven over many years by people who do their best to try and wear them out.
That Model 21 O/U is an unproven design. Unique no doubt, but proven? Nope.
You want a SxS, then a CSMC model 21 wouldn't be a bad choice since you are willing to spend that kind of money. O/U? Perazzi.
+1 on the Perazzi. None of these is close, including the Blaser, IMO. I've been shooting these guns for 25 years, and they are built like trucks and move like Ferraris.
