Aloha everyone in this forum but debating to get another metal detector but having hard time deciding!! Currently I have 2 Whites Surfmaster PI's and found lots of gold with it but am looking to add a new detector to my arsenal. I live in Hawaii and have to deal with hot rocks, black sand and lots of metal in the water. Can anyone help me decide which metal detector would be my best bet for my location?? I heard from some of you that the Excalibur doesn't work good in Hawaii and that the CZ-21 would be a better choice. What about the new Whites Dual Frequency?? Any feedback would be much appreciated!!!