Hi been away for most of the summer to come home to find out a nephew who just turned 17 wants a new internal pack . He has been doing his share of talking to people and while i have suggested the ULA packs in that if i was to get a new internal based on all i have read here and the quality of the company, but he seems dead set on wanting an Osprey Aether. through my sources i can get him either the older version or the new version both brand new and both available in a variety of sizes. He thinks he wants to go big going the route of the 70. Any one have any experience with the difference between the older and new model of the Osprey Aether 70? thanks