Eberlestock makes some pretty solid packs. Have had the chance to play with a number of different models I can tell you that you won't go wrong purchasing one. Yes they are expensive and yes the are purpose built for military users (although they do have a good hunting line as well) so they may be overkill for some. However comparing an Eberlestock pack to the knock-offs Cheaper then Dirt sells would be more akin to comparing a $60,000 sports car to an imitation of a $12,000 built with cheaper materials by under-skilled workers.

I don't know what your actual application will be, but you mentioned abuse and long distances. The Eberlestock will do the job, do it well and hold up to all but the worst you can throw at it. No matter what pack you decide on, if you want a pack that is built well enough to carry a heavy load (relatively) comfortably on a long abusive trek(s) then you are going to need to spend some money. Sure there are civilian packs that work, but the really good ones are expensive as well.

When it comes to survival and field equipment... You get what you pay for.