Has anyone used this pack?http://www.backcountry.com/store/KEL0469/Kelty-Agile-Backpack-4500-cu-in.html
I use the nimble which is the 3500 cu inch version. I like it and have no problems carrying loads up to 35lbs. Good pack for the money.
http://www.campmor.com/webapp/wcs/stores/servlet/ProductDisplay?productId=39284192&memberId=12500226
Cheaper here.