One of the watches that always fascinated me is the DeepSea SeaDweller. Despite the size, I always appreciated the engineering and details that are in the Rolex DeepSea.
Also appealing is that the DeepSea has functions and details found on no other Rolex model. Like my other favorite Rolex, the revised 42mm Explorer II, the DeepSea is only available in 904L stainless steel. The DeepSea aspects that speak to me (aka -are just cool) are the crystal, bracelet clasp, and the titanium ring lock caseback. These details are what drew me to the watch and are the same features that are found on no other watch, including ones in the Rolex line.
There is more to the review at http://www.minus4plus6.com/deepsea.htm
All errors and omissions are mine, so feel free to point them out.
-Sheldon