Lots and lots of experience.
Hahaha - just kidding.
Of course, it's my opinion.
But I've spent enough time looking into this kind of stuff to feel confident that it's an informed opinion.
Other people like other things. For instance, this is a pretty nice gun:
http://rogerbain.com/catalog/product_info.php/cPath/22/products_id/339?But compared to a Boss, I think Purdeys (even ones with Extra Finish) are a bit dull.
Not every Boss is fantastic. But the ones that are can't be beat (according to me).
BTW: the square bodies at Jaqua's are missing the double beads on the action that I like so much. That means they're almost the pinnacle, but not quite there. For me, of course.
OWD
