Considering I'm not into classical, tradition-keeping attire, internationally, I like Malin Baryard-Johnsson. She's always wearing something new and cutting edge extravagant. She even poses as a model at times...
This is copied from her profile on the FEI Alltech Games website
She agreed a partnership deal with Swedish clothing company H&M in 1996. As part of the sponsorship agreement, she models the company's new ranges. Fellow Swedish show jumper Peder Fredricson also signed with H&M in 2003 and the pair model the ranges together. She also does television work [including hosting her own show], appears in films, is a gold disc-winning singer and owns a restaurant. "It seems to be an awful lot," she said. "But that's exactly how I want it, I love trying out new things. I have to have new things going on around me, that's what I thrive on." (H&M, 03 Dec 2007)
In association with H&M, she has helped their designers come up with a steady stream of equestrian jackets that follow the latest styles. "I got tired of our old riding fashions that have looked the same for a hundred years, " she said. "After horses, fashion is my main interest." (H&M, 03 Dec 2007)
Over what hill? Where? When? I don\'t remember any hill....
Are we talking sartorial style? If so, then the Europeans, particularly the French. For example, I just spent waaaaaayyy more money on a show jacket and a show shirt than I ever would have considered, because of how they looked on Penelope Leprevost. Meredith Michaels Beerbaum is creating a lot of positive noise with the brown boots she wore recently at Le Saut Hermes in Paris.
If we're talking horse related style and accessories, and the american consumer, then I would think of those bastions of style from the Old Guard -- think the old horsey families in the horsey enclaves of the Hamptons, Upperville, Devon...
Depends on what kind of style and the market, really.