Gregory and Osprey are two brands you may also want to check out. They are generally considered the best.
By far the most important consideration when buying a pack is fit. Buy the one that fits, even if it's expensive and may not have the best features. (You might be lucky and find many that fit well, in which case go for features/construction/etc). If you sacrifice fit to save money or to get a certain feature you'll quite likely regret it on the trail.