I looked online at the Ula Cdt pack. The weight is not bad but the overall size of the 54L pack may be a bit bulky for day hikes. It would be nice to try it on but I'm not sure who carries it. If you are interested in it there might be someplace in Portland or Seattle. In Southern Oregon there's not many options. As far as the price, if you find something that really works for you then it would be worth it since it should last several years.
I don't have much in the way of hips so most backpacks with some weight in them tend to slide down unless I cinch the belt to the point where my intestines start screaming for help. With daypacks the issue isn't as bad but as noted in my previous post I almost have to dislocate my shoulder inorder to get the water bottle out of the pocket on most packs.