Hi .. Never try infinium(Pi) .my friends own excalibur ( very good machine but cant take that loud noise) ...Nice finds. I am looking at buying a salt water detector. If you could do it again would you buy a cz21 again? Can you compare to any other water detector on the market. I am going back and forth between the Garrett infinium or the cz21. What do you think about the multi town feature? Can you disc out tabs and still find gold? Sorry about all the questions, Thanks.