Here is a link to a 5-day pack test backpacker recently conducted.
http://www.backpacker.com/article/0,2646,1715,00.html It mentions the Wolfskin Trailhead and six other packs under $250 suitable for a 5-day. The price range addressed eliminates both Arcteryx and Dana Design, two brands that often come up when you ask for the best.
I currently have a Dana Bomb Pack that has kept me very happy. Dana offers, on average, 4 5 sizes of frames, harnesses and belts with each of its larger models. With these options, you can truly fit the pack to your exact frame. Their attention to detail is very apparent. Strong stitching and abundant bartacks result in a product that is sure to last. Their hipbelts, for me, are some of the most supportive I have played with (next to Gregory). Mountain Gear sells Dana online (as well as Arc'teryx and Gregory)and their staff is really helpful.
http://www.mgear.com/
My first pack was a Lowe Alpine Contour III, and it is still serving me well after seven years. It can be had these days for about $150. Its durability has been good and its load carrying ability okay, but still far below that of my Dana. It is one of the most rented packs you will see on the trail. Outfitters like them because they are a decent pack, at a good price, that will fit just about anyone. If you are looking for a starter pack, this may be it.
As for Jack Wolfskin, about six or so years ago, they were known for being a steal. They sold a moderately high quality product for a low-end price. The one complaint they were getting is that their packs were not that adjustable and didn't fit certain people. They may have since worked this out.
My thoughts say you get what you pay for. If you buy a Jack Wolfskin or Lowe Alpine now,and really put it to work, you will want something better in about five years. If you want something that will never fight you on the trail, and will probably outlast you, I recommend a Dana. If you continue to ask around, the three names that will come up constantly are Dana Designs, Arcteryx and Gregory.
Sorry for being long winded. I get excited about backpacks.
Switchback
[This message has been edited by switchback (edited 02-20-2001).]