I can't say anything different than what everyone else is saying, but I'd still like to add my two cents. Ironman watches are awesome and relatively cheap in the grand scale of watch costs. If it gets gross you can wash it off. Its water resistant; if it gets blood on it, no big deal, just clean it. If it gets so dirty you don't feel comfortable wearing it, then go ahead and get a new one. I've dropped mine, I've had it stepped on and kicked (the rare time it wasn't on my wrist), smacked it against the gurney/monitor, etc. Still works perfectly. Its become an everyday wear for me. The only thing that sucks is I have a slight tanline from wearing it so much.
Alright, that's enough of my unpaid Ironman shill. Go cheapo on everything like everyone else said, and get yourself a sweet Ironman watch. Good luck to you and everyone else in this thread who are starting classes!