I tried to track down the original interview and couldn't find it, so had to go with what I had, which was the LOST-TV.com announcement about it, which had JJ saying, the actor will be payed his desired rate, which does seem to indicate one of the men. I'd be just as happy if it was, say, Maggie Grace, who's character doesn't seem to do much.

they were going to be killed off in the seocnd season anyway,

That's good to know. :D