Handheld or Dash GPS

When we bought our boat it was supposed to have a handheld garmin gps unit that came with it. The previous owner said it was in the cabin, and we forgot to look before we left. Of course, it wasn't really there, so we ended up buying a dash (helm) model, but now I think I'd like to have had the hand held one. It's so much more versatile, and you can move around with it. Even take it off the boat, use it in the car, or just as we explore some of the islands that we play around on during the summer. I think that's going to be my Christmas present to myself.