I've had 'em all.
The winner, by unanimous decision is....the Mystery Ranch Crew Cab. In fact I hauled out two loads of elk on Tuesday. One load with a badlands pack and one with the crew cab. Mind you, these are all the best packs, but here is how I rank them:
1. MR
2. Badlands
3. Eberlestock
The problem I had w/ the Eberlestock, and many others have had as well, is that the load feels disjointed from your back. You have no mechanism of sinching that stuff you're carrying tight to you, because there are several inches of free space designed to carry your rifle. And I'm a bowhunter, so I could care less.
Badlands has always been awesome. No complaints. I have had, or own now, the 4500, 2200, superday, hyperlight, and a few smaller packs. Love them. The hyperlight is my favorite day pack...but, when and if you need to carry meat, the MR is king.