I have just recently been looking into 6000+ cu in packs recently and developed a spreadsheet of the basic technical data. Here it is if you're interested:

Model Capacity (cu in) Torso Range Weight Price Cu In / lb
Eastern Mountain Sports Solitude 6000 18 – 22 5.38 lb $199 1116.28
Jandd Goliath Expedition 8974 17 – 23 8.19 lb $320 1096.06
Osprey Argon 110 6900 18 – 24.5 6.81 lb $399 1012.84
Mystery Ranch G-7000 7000 12 – 24 8.25 lb $550 848.48
Gregory Denali Pro 105 6450 15.5 – 21.5 7.75 lb $459 832.26
Bergans of Norway Alpine Escape 7900 18 – 24 9.50 lb $440 831.58
Arc'teryx Bora 95 6220 16 – 23 7.50 lb $435 829.33


Sorry it doesn't look any nicer. Check out the last column where I calculated cu in/lb. The Jandd Goliath Expedition looks monstrous - 8974 cu in and weighing in at 8.19 lb! After looking at all these I think I've settled in on the Osprey Argon 110. It's large enough for major expeditions, has a good ratio of weight to carrying capacity as well as good overall weight in this particular category of packs and I can get the hipbelt custom molded, which is a real plus since I'll be carrying a major load.

Also note that if you get the Bergans Alpine Escape there's a replacement top that has extra carrying capacity of about 1800 cu in, making it a total of 9700 cu in!! But... very heavy.