Like anything else it's how much do you want to spend. the problem with saddles is it's like boots, even high end ones are no good if the don't fit you, and your horse.
I used to rida A LOT and at one point I broke down and had a couple custom saddles made, worth every penny and I'll use them the rest of my life.
I see good saddles on craigslist from time to time, a good broke in one that you can try before you buy is hard to beat.
Stay thirsty my friends