So I've been looking for a new pack for 2-5 day hikes. I recently found through work I get a killer discount on Gregory packs. Cool, however due to there cost I really haven't looked at them before. I'm looking for a light back +/- 50L. I'm 6'2" and looking to carry 30-40 lbs of gear. Less in the future. Do any of you have first hand experience with the below packs? - z55 or z45 - Savant 48 or 58 Any other Gregory input or experience would be great too.