The BSS is a decent shotgun, but IMO they’re getting a bit over-priced. If you can find one at a good deal, I see nothing wrong with letting your Superposed go. Superposed shotguns aren’t all that rare, so if the move turns out to be a mistake, it’s one that can be undone. Just buy well and no harm should befall you. I have encountered some trigger problems with the BSS from time to time, but nothing that wasn’t easily fixed.

Vintage and Double Gun Loony