I am surprised at some of the comments on the Society of Master Saddlers as some sort of brand only rep group. Perhaps there is a fundamental misunderstanding about what the SMS is or does. There is no US equivalent, not even in concept, and brand rep certainly does not match in any way.
http://www.mastersaddlers.co.uk/downloads/pathqsf.pdf
That is a useful link that shows how someone can obtain the qualification of a Qualified Saddle Fitter. Note the three years of work experience required!!
I have worked with a Qualified Saddle Fitter and there was absolutely no brand preference expressed, nor any favoritism towards British made saddles. It was all about what fit the horse, and then, whether the saddle fit me. I would give her price point, and she would bring along a truck full of saddles that might fit my horse and I. I specified new or used-- and in each case of purchase, it was used. Because that was the best fit for my horse, first of all, and me, second.