My wife surprised me the other day when she mentioned that she has often thought it might be fun to have a metal detector . . . I never pictured her as the type of person to walk around aimlessly looking for loose coins or rusty nails, but hey, if she's interested I figure it may make a good gift . . . and maybe provide me with a useful tool when I lose something in middle of the woods or what have you. Anyone know anything about metal detectors . . . good features to have, reputable makes/models, etc.