I would highly recommend the EXO pack. Great features and super comfortable---I used it last year and hauled out quite a few animals. I have the 3500 and it is plenty big enough for a 5 or so day hunt. I usually hunt the high country for a couple of days, go back down, regroup and head back up and it fits that niche nicely along with making a great day pack. I'm a pretty easy guy to please and if I had to say anything negative, it would be:
Not real crazy about the reverse top lid. Not that big a deal but it would be better for me if it was the traditional style.
And the slide buckles have "teeth" in them which make them difficult for the webbing to slide. I know some other guys which have just filed them down and they say it works wonders.
Great company and great pack. MADE IN THE USA!
Randy