Re: Eberlestock X1 for packing a deer
I'd consider the J34. I had an X1E and ended up selling it to buy the J34. Both are nice, but the expansion capability of the J34 is really nice when packing heavy or bulky loads. I also like the convenience of the two wing pockets better than the layout of the XI packs, and the weight isn't that much different. I've had loads near 100lbs in mine more comfortably than I'd have believed possible. I use mine for everything I want more than 1300cu for.
Both of these packs are fairly wide, something to consider if you carry your rifle on a sling very often. If you use the scabbard they are real comfortable.