If I were replacing my current pack (I'm not, but the model was discontinued in 2006, so if it should fall apart I can't replace it), I'd look at both ULA and Elemental Horizons before trying any other packs. Both these firms have excellent customer service and will work with you to come up with the pack you want.

Before ordering, be sure to have all your gear on hand and ready to pack, including the equivalent in weight/bulk of a week's food and a day's water. When the pack arrives, load it up and take a "hike" around the house and, if the weather is good, a longer hike around the neighborhood while the pack is still returnable Be sure to leave the tags on and keep the pack clean. Do this before the return deadline (check the maker's website). Yes, you'll have to pay return shipping, but it's more important to get a pack that fits you and fits your gear!