Durable will cost more, cheap will not last, but there can be a happy medium. The military style packs have many attachment points which can be practical, but they do not carry as well as the good civilian ones. It really all depends on you, your environment and what you you will carry in it and for how far. Something to keep in a car trunk that will not be used for extensive hiking leans toward the military style. Not too expensive, will work, and are versatile. Something that you will be hiking with over long distances will require a well fitting pack. It is all dependent on your needs.