I have not found any brand that I love more than another. You ALWAYS get what you pay for. A more expensive door will have better finish and heavier metal parts. Glass is glass, but a more expensive door will have thicker glass.
Overall, the best doors are probably from a custom door company. In any given area, there are probably one or more companies who specialize in custom doors. For a basic bypass door, "normal" size range, plain clear or frosted glass, regular polished chrome finish, you can get that INSTALLED for not much more than the cost of a door alone at the depot or a supply house. Now, if you want chatzky finishes and glass, the price goes UP!