I am going to a week long marketing conference in San Francisco in a few weeks and I am looking for a new backpack to carry with me as I will be walking a lot. I am currently using this backpack for work and while I think it's a great pack, it's a little bulky and heavy for walking around for 6-9 hours a day. I am looking for a durable backpack with lots of compartments, a sternum strap, a side pouch for a water bottle, and be able to fit a 15 inch laptop. Here is what I have been considering so far: Timbuk2 Showdown Ogio Renegade Tumbuk2 Q Honestly, if SwissGear would just add sternum straps to their packs, I would have a few of those on my list too! Any recommendations?