Thanks for all the help everyone, but I found the Camelbak Uproar to suit my needs. It has a laptop sleeve that doubles as a hydration pouch reservoir for hikes, compression straps, plenty of organization, and even a bottle pocket.
I almost got this beast:
M.A.S.K. Laptop Backpack, but that'll be a purchase for a later date, when I can utilize it more fully (I really like this damn bag, though, I tell ya' what).