that's a tough question without knowing what your budget range is. I generally recommend Pessoas to most people. They're fantastic, great quality, fit most horses well, put your leg in the correct place, excellent resale value, etc. New they're about $2000, used anywhere starting around $500 and up depending on age. If your budget is less i'd recommend a Collegiate. You can get a nice used one for just a few hundred. A new one for about $1000 I think. If you budget is a lot more, my top 3 favorites are devoucoux, delgrange (or my personal favorite) antares. They're about $4000 new, but worth every penny if you have it.