LAST EDITED ON Jan-20-13 AT 02:25PM (MST)[p]I would go with Mystery Ranch between the two. However, I wouldn't buy either. I have owned 3 MR packs, including a crew cab. I have also used a friend's Elberlestock.
The best pack I have ever owned was a Kifaru Timberline 1. I am thinking about selling it to get the new Kifaru Highcamp though.
MR Crew Cab = 7lbs 11 oz (5000 CI) $592.00
Kifaru Timberline = 5lbs 9oz (7200 CI) $636.00
Kifaru Highcamp = 4lbs 8 oz (7000 CI) $601.00
Just like the CC the HC is an external frame, and you can buy multiple bags.
My sleep system being a tarp, bivy, and sleeping bag only weighs 4.18 lbs. The CC weighs 3 lbs 3 oz more than a HC. So, for just under one pound, I am carrying a whole sleep system. You also get 2000 more CI for just $9.00. Just my opinion.