That is a difficult question. Depends on if the Shows you will be using the Saddle for are Fun Shows or Sanctioned Shows.
If Money is no Object, many say Dale Chavez or Bob's Custom is the Best, but, there are Dozens of other very good brands that are more reasonably priced even if used in the Sanctioned Shows.
The best Saddles are generally custom made and can take 6-26 weeks, depending on what brand to manufacture.
Good Brands will cost 2,000.00, very good Brands 2,500.00 to 3,500.00, the brands that some say are best 6,000 to 8,000.00
The less expensive brands can be found in stock, Like Circle Y, Billy Cook Greenville, Tex-Tan, Crates.
Word of caution, there are many cheap Imports sold here made in Kanpur India, that may look nice but are made with Buffalo Leather and cheap trees, too many to list of those brands
What type of Showing and Breed of Horse?, that can help narrow down whether you want to look at off the shelf or Custom.