WLE, I am in the same boat. I have been looking for a new daypack. It is crazy how the different packs from the same manufacturer fit. I have been through an eberlestock sling shot, which was the second most uncomfortable thing i've experienced( second only to a vasectomy
) Badlands hyperhydro, ultra day, superday, and just picked up the diablo to give it a go. I tried the sitka flash 20 while I was at bass pro and it was very comfortable. I just was hoping not to have to spend that much money on one. Evidently they don't make packs for my body type. Tall and skinny! Hope this helps. I'll let you know what I think of the diablo. I'm going to put some weight in it and take the hound for a walk.