If you can find one get a stainless Rolex Daytona. They are not TOO flashy but people that know watches know that this watch is everything you'd want. I wear mine almost all the time (at the river, in the ocean, etc etc) I also have a breitling Navitimer that has been a very very good watch. the same applies as stated above; rare and not TOO flashy. And no Nort you can't have it!!
You could buy one of the g shocks or what ever for under 100 bucks, but why not have something that is nice....You work hard, you deserve it!