I don't know about skinny, but my legs are quite long lol (I'm 5'10). Kerrit breeches are on the low side of the budget, but they're a bit low on quality. Ariat breeches are midrange, and are some of the best breeches I've ever owned; I highly recommend them. Just make sure to try them on, their sizes can be a bit off. On the high end of the budget, Tailored Sportsmans are great breeches, they just have Velcro bottoms if you're going to be picky. Their price is really the only negative thing about them.
Hope that helped!
I like the tailored sportsmans, just make sure to get them in tall!
Kerrits breeches are good!