I'm going to go for a new detector for Hawaiian beaches and underwater snorkling use and am fairly much a newby, at least to the new-tech units. I have done a little bit of land detecting years ago but everything is totally different now with the machines. I'm leaning towards the Ex II as I like the sound of the multi freq and discrimination, but a local dealer is telling me about the Surfmaster and how awesome the PI thing is. I could sure use some opinions from you guys that at least have a bunch of hours attatched to one or the other. Also, is there a big difference between the Ex I and the Ex II other then some flourecent green paint? Also, am I missing some other super steller unit in my choices?