Deuter Spectro AC 38

Comfortable, light versatile, there is an external zipper access under the shovel pocket, water bottle sleeves are large and secure, though slightly difficult to reach around and grab.

Only drawback of some significance is the lack of an integrated rainfly, but those are sold seperately. LOL But besides that this pack will stay with me till it plays out, if that is possible. Highly recommended and why not, it's a Deuter.

Update: November 23, 2011

Okay, so it has been two years, about, and no complaints. Not really meant for over twenty pounds. But makes one of the best large daypacks that I have ever owned. 

Fly fishing on the Green in Utah, performed flawlessly for entire days on my back, lugging waders down and up the canyon, leaving on with my hydration bladder, layers, food, and extra tackle; and over a year of college classes, along with lugging everything I needed around town. 

Elastic shove it pouches have some slight stains on them, and the back mesh panel is a little stretched out. But besides those, no complaints.