I have a pair of Tailored Sportsman for bigger shows, but for smaller shows I would reccommend Kerrits or Devon Aire.
I have had one pair of Kerrits breeches for YEARS. They got a small snag in them because-- well, let's just say I was not very coordinated and walked into a fence. Nothing to do with the quality of the breeches. The snag has not grown, though, and they still fit pretty well. They stretched out a tad, but, for having lasted me 3+ years, they're doing great.
I recently got a pair of Devon Aire breeches on sale through Dover and I really like them. They fit well (not too baggy, but not too tight) and have ankle closures-- really helpful when you have ridiculously skinny ankles. I would reccommend these more than Kerrits for showing, just because they have a nicer fit. They run a little under 40 bucks-- in comparison to other breeches (esp. Tailored Sportsman and Ariat) not too overpriced.
I also have some Ovation breeches for schooling, but I would not reccommend these. They are thick cloth but do show panty lines VERY WELL. Maybe this isn't a big concern, but, I'd steer clear if I could help it. They work for riding in lessons where looks aren't a concern, but I would not want my butt broadcasted at a show with panties showing! x)
Good luck with your showing endeavors, hope everything goes well!
Not everyone can win national titles -- Very few ever compete beyond the local or regional levels, & only the especially fortunate make it onto the world stage
But no one who has ever sat in a saddle has lost