Osprey Aether 85
I just recently got this pack because I am going to be working at a camp in Montana for the summer. I needed something that will carry my camping and climbing stuff comfortably. This pack is great so far. It sits very nicely on my back and doesn't feel like I am getting pulled backwards when hiking. One thing I wanted to mention though is that if you are planning on getting the Osprey raincover for it, I recommend getting the medium sized cover. I tried the large on it at the store and it was way too big and baggy, even when the bad was packed with stuff. The medium raincover might be a little bit tight if you are planning on packing this bag to its max but for me it should work out just right.
good luck. :-)