I am looking to purchase a new pack and I am curious. Some friends of mine have the Cabelas Rucksack and some of them have the Flambeau pack. I am looking at the Final Approach Guide's X-Treme BackPack and and curious to see if anyone out there has an opinion on all three of these? The Final Approach has a built in tree strap and they say is over 2200 cu in in total space...does anyone have a suggestion on what pack to go with?