I love the dial on the 728 although I am not sure about the fact that the case is made of titanium. I prefer SS for the weight and look and feel.
I really love my 676 from the first 'Due' launch. I do understand the critism about the WR, but for a swim I have my zero and my Hulk
For me it is a direct hit regarding wearability, without losing the typical Panerai caractaristics.
Some pictures of my Due: