I have two pairs of Costas now, one pair of Green Tint 400 and now the Copper 580 Hammerheads. I bought them both for inshore flats fishing here in Florida. The Copper 580s cut through the water glare and allow sight fishing with ease.
I have beat this watch to death since 2006 and it is still the best watch I own. My Rolex stays at home now. The sand in Afghanistan wore the lable off the watch but it held up through a deployment.