Here in South Africa, we don't see a huge range of saddles. The ones I know of here are:
Pessoa, Prestige, Black Country, Ideal, Wintec, Bates, Kieffer, Tekna, GFS, Trainers. There are others, of course. A lot of people still ride in Jeffries, Lairds (though they're rare nowadays), Stubben, etc etc.
What would you say are the most popular English riding saddles in America/Europe and:
What makes them so popular? The quality? Are they very adjustable? The comfort? Do they fit a lot of different types of horses? Are they affordable?