Like I said, go with the Buckmaster and you will NOT be disappointed. VERY solid.
Chris Reeve also makes very well-respected hollow-handle knives that you are looking for. (although NOT anywhere NEAR as cool-looking as the Buckmaster, IMO!)
Keep in mind though, that the Buckmaster has been out of production for about 10 years, so it is somewhat of a collectors item. You may want to get an already used one, and perhaps a pristine one for your collection. Mine is pristine, and I've decided to keep it that way. Mine was also issued to a SEAL.
There are always several on ebay.
Good luck,
Drjones