Based on your other, fairly light, gear choices, the sales person should have pointed you toward the Osprey Exos 46 or 58 pack, or a Gregory Z-series pack, or a Granite Gear Vapor or Nimbus series pack. You really don't need a 6+ pound pack. Assuming that your total load of food, water, and gear is under 30 pounds, you probably want to look at packs in the 3-pound-and-under category. By the way, Backcountry Gear, also accessible through the Portal above, has the two Exos packs on sale right now. (Disclaimer: I recently switched from the Granite Gear Vapor Trail to the Osprey Exos 58. Both are excellent, but I like the Exos better.)