Osprey Xenon 70

Great pack, but fits a little funny.

I used this pack on two multiple-day trips and it held up very nicely. It is very solidly built and seems like it would last a long time. However the framing on the pack pushes away from the back and caused some straining in my lower back, no matter how I adjusted it. I also experienced some pinching in my shoulder blades from the padding.

And yes, I did have my correct size and even had it adjusted by an expert, no luck. This pack didn't fit me but it might fit you, and if it does, you will have an excellent expedition style pack with plenty of room. I ended up trading this in for the 2013 Osprey Ariel 65L, which is lighter and distributes the weight comfortably. 

Just for reference I'm 5'7", 130lbs and my torso length is 18", and I had a women's size M.