The old stand-by brands are Snap-On, S-K Wayne, and Wright. May be some others as well. Craftsman USED to be just as good. If you stumble across an older Craftsman set at an auction or yard sale, buy it.
If you're looking for a set to carry with you in the truck or tractor, go with the cheap sets from Harbor Freight or Northern. You won't cry quite as much when you lose them.