I have a 2009 AARN Peak Aspiration pack with Sport Pockets and Lasso Locks for sale. Pack is in excellent condition, used twice, frame size large (I am 6', 35 waist, fits me fine). I purchased last month from Mule.
This is a really comfortable pack to carry, front pockets carry water, camera, food, all the stuff you like to get at without taking off the pack.
There is a thread on these packs in the "non hammock gear discussion" forum thread. This one is 55 liter, I find I need one a bit larger. AARN has a great website to learn more about the pack.
Price is $175 includes shipping to lower 48.