Re: Eberlestock pack advice
Not knowing what you will be using your pack for but looking at your choices, I would guess that you are undecided if you need the extra space or a removable scabbard.
For me I don't find the removable scabbard useful, because if you are packing light and just bringing your rifle and limited gear, you can always use the extra space for ammo, and hydration packs.
If you are undecided if you need the extra room, and want a pack that is versatile...I would suggest also looking at the Dragonfly. That's the one I use, and like the most. It goes from 2900 cubic inches and expands to 5400 cubic inches, with a duffel you can expand to 7900 cubic inches. Plus the top pack comes off, which you can use it as a large fanny pack for hydration or gear. The only down size, which can also be a good aspect depending on your use and preference, is the lack of PALS webbing on the back of the pack. However it has enough PALS webbing on the belt and sides for my liking, including enough room on side to add a side scabbard.