In the footsteps of my good Uncle Mac.
Optimo Walnut. Sitting on Alden Cigar Cap Toe Bluchers. :-)
I recommend Brent Black's Panama Hats of the Pacific. He could make you more or less anything you'd like. A 3 inch brim on a good quality Panama would be very striking and may suit you. However, it would be quite floppy and would be prey to the wind. Lower-grade Panamas are stiffer, generally, and are less affected by the wind and could be a better choice for a very wide brimmed hat.