There are so many great brands out there! It all depends on how much you want to spend. GhoDho are super nice but a bit more on the expensive side. Ariat, Tailored Sportsman, Noble Outfitters, and Romfh are really great too, and are priced more around the median. If you want to spend less, Riding Sport and Piper both carry show breeches that aren't too pricey but are still very good quality.
Personally I think Ariat has really good show breeches also I agree that Tailored Sportsmans are amazing!I have to pairs of Tailored Sportsmans and one Ariat pair.They both last a long time and don't fall apart.They look really nice in the show ring to.I would definitely recommend both brands.Hopefully this helped!