I would guess the ones in his pic are the United Cutlery Reproductions. But if not then the 2 on the left would be Lile and the right one would be Hibben. I like Crain's a lot, having been a part of the Aliens-Predator universe myself I very much want to get one of his from the first Pred-film.
I have an Aitor Jungle King 1 and I have little concern about it's sturdiness or ability to perform as a quality knife. Even the saw on the back of the JK1 is functional. The survival kit it comes with is much more than it's hollow handle. It is profuse with equiment in its sheath and storage compartments.
I dont think the argument of "I can carry this stuff in my pocket is 100% valid. One of the major points I see of hollow handled knives, particularly with sheath systems, is that it is one thing that performs many functions. Instead of carrying a crapload of gear and kits you can carry this one knife. Although carrying the right tool for the right job will always be more effective, it is the convienience and weight reduction that gives a quality hollow-handle w/ survival kit it's advantage. An analogy I think that fits is: Sure you can carry a full on craftsman toolbox around with you and be prepared for a lot of circumstances, or you can cover most of those problems with a pocket multitool, although not as effective, much lighter and more conveinient.
One of the bigest problems with Hollow handled knives is that most of them are poop. They are gimmicky and of poor quality. There are those that are good like the Aitor (wich admittedly borders on gimmicky with all its riduculous stuff) and those that are excellent such as the CRK's, Randalls, and customs. They just arnt as mainstreem so the representive community is mostly what not2sharp posted....or them rambo-remakes.