I just ordered myself a pack. I take a small cooler (lunch) and 2 gallons of water with me to work every day, and I usually take a pair of running shoes and a change of clothes in a separate bag. Add a coffee thermos and its a lot of stuff. Normally I would have something issued I could use for at least some of it, but at the school I'm at right now that's not the case.
My wife told me I needed to get a new pack or my old one would bust at the seams....and as usual, I figured if I'm going to do it I might as well do it right. This thing will work for weekend trips, short backpacking trips, and I can expand the capacity a bit more with some external pouches and use it for longer trips too.
I'll post pictures when it gets here - they said they were a couple weeks behind on shipping, but they do have it in stock. Normally they have a 4-6 week wait if they have to make it. So, maybe it'll be here next week, and maybe it'll be a month. Either way I'll post pictures and tell more when it gets here. For now, here's a link: