Be aware that the sea-hunter is a pulse. And so even though it has a rudimentary discrimination, yet I don't think it's gonna knock out iron. Eg.: bobby pins, nails, etc... You can knock out foil and tabs perhaps (but why would you do that if your objective is gold jewelry on the beach??) But unlike standard discriminators, a pulse will loose iron last (rather than first) on the TID scale.
So if you plan to get the sea hunter, just be aware that you might be hating life if you get on a nail-riddled beach.
I'd go with the Excal. You can get the cheaper on the used market. Or, heck, if you're not planning on going UNDER water (ie.: submerged) and are just gonna use it on the beach, or at ankle-depth, etc..., then you don't need a water-proof/submersible machine. An explorer, CZ6, 6000 di pro, or any number of land machines do just fine (so long as they work well on wet mineralized salt).
About the only exception I can think of, to my dislike of pulses, is if there were absolutely no other way on some super mineralized beaches. There are supposedly some beaches where the sand is like gun-powder black. In those rare circumstances, only a pulse will cut it.
