Predator: Dutch's Team

I like Predator and enjoy the alien aspect quite a bit. But my favorite part of the movie is just the sheer badassery of the team. I've always been into GI Joe as well, and this group seems closest to a real life Joe team; with the nonstandard uniform, highly customized weapons and different specialties. I guess the closest in real life is a black ops assault/rescue team employed by the CIA SAD (which is sort of what they are in the movie.)

Are there other movies that ride this line of fantasy and believability? Sci-fi elements a plus, but not needed.