The only pack I have is a KUIU. I've done several elk and liked it with no problems.
Had a Eberlestock and that thing did everything it could to kill me on the one and only pack I used. Sold it. It didn't like me and I didn't like it.
If I was a lot younger I'd try the EXO other half just bought one and has been using it to get use to it. It looks good and sets right on his back.
Just remember everyone's back and body its different. What I like and what fits me may not be right for you.
Good luck on your choice.