I sure like my 3700 and will never get rid of it. I have 2 KU long pockets and a grab it and it is a very versatile pack for lots of situations. My Longhunter stayed at home last year and I used the 3700 exclusively, no issues.
I have a 3700. It carries like a dream. I would have preferred a ULA style roll top, but that is a minor issue. I tried running a KU E&E on the back and that really didn't work well for me. I plan to get some KU long pockets and I think it'll make a great hiking pack. For packing out meat, I think I'd prefer something else, but the suspension is up to the task, IMO. It is about the size of a ULA Catalyst, weighs less, and will carry twice the weight, it that is necessary. One mod I plan to do is attatch some fastex loops to the top of the stay pockets to secure a small KU pod on top. I hate the way the pod flops around only attatched on that sil lid.