If you want a great Waterman pen, then you will be very interested in getting your hands on the Waterman Edson, which can be found at http://www.watermanedson.com among many other places too. For example, good old Amazon and or eBay.com are also great places to find these pens. The famous Waterman Edson is pretty darn pricey, but it is also made with some really high quality materials, metals, and even some good stones as well, depending on the model. You wont be disappointed with the Edson; just leave it laying on your desk, and anyone that comes into your office will probably be drooling over it.
The collectors edition Waterman pens are also really nice too, but they tend to be pretty expensive too. But if you want to end up with a pen that may end up not even on the marketing in a couple of years, then you will probably love the limited edition / collectors edition Waterman pens.