DWI (you either love them or you hate them) have got the Garmin Fenix 3 watch including the HRM-Run chest strap for $529 for 24 hours with free shipping to metro areas, and what seems to be $15 shipping to regional areas. This is a pretty good deal since it includes the HRM-Run strap which I don't think the other offers on here have had recently. With a quick Google search, it seems this bundle is easily over $600-$650 elsewhere. Other places might have the watch on it's own for maybe 10 bucks cheaper, but then you'll be looking at around $100 extra to get the HRM-Run separately. Also they are throwing in a "sports belt bag" for free.
These are a great GPS watch that do almost everything you'd need in a multisport / outdoors watch.