I'd suggest looking for a backpack that's a bit smaller and one lb. lighter...unless you want a large pack for bulky winter gear.
My winter backpack is a vey large (7,000 cu. in.), VERY heavy (7 lb. 8 oz.) Dana Terraplane. Bought it when I was on the Dark Side.
My 3 season pack is a light (3. 4 oz.) REI Cruise UL 60 (3,800 cu. in.) pack W/ REI side pockets added.
Now I'm on the "Light" Side. Heh,heh
"There are no comfortable backpacks. Some are just less uncomfortable than others."