Not that my opinion matters too much at this point, but I wouldn't like a name that's super serious. Names I'd like to stay away from would be:
Ninja Dawgz
Night Snakes
Combat Walruses
IMO, that's really, really lame. I personally like Superfly TNT, not only cause it just sounds cool but it's kind of funny.
One more thing. Is this going to be a club that takes things really serious? You know, like some dumb oath of "enlistment" and all that stuff? I understand the realism element of this hobby/sport but one thing I've never been able to handle are all these lame military terms. Red Devils, Dirt Dawgs. Ugh, give me a break. I'd like to just go out and continue to learn tactics and have a good time with people that have the same attitude.