If you want discrimination, the Excalibur is a great machine for deep water, and currently available. There is a new XP Deus 2 coming out right now also and is getting good reviews so far, but, a bit early to make a judgment on. It's rated to 60 feet and also discriminates. The Fisher CZ21 is also a good reliable beach/dive machine, but, like the Excalibur, is 20+ year old tech. There are very few new PI machines on the market right now. They don't discriminate well (if at all on some models), so, if you have lots of iron junk in your search area, it will drive you crazy digging them. The Garrett Sea Hunter is probably the least expensive of the bunch. The only other ones available new that I can think of are the J.W. Fishers 6X and 8X models, Garrett ATX, and some Aquascan models, which are much more expensive than the Sea Hunter. The only other options for a PI machine would be a used one. The White's TDI, Garrett Infinium, and Tesoro Sand Shark all are fine PI detectors, but, they've all been discontinued, and in the case of White's and Tesoro, the manufacturer is out of business. Don't get talked into buying any single frequency detectors. Not only are they miserable in wet salt water, they aren't rated deep enough for your expressed use. Same goes for some excellent beach machines by Minelab, like the CTX and Equinox. Great machines, but, they only have a 10' rating, and that's a bit generous in some cases. Same goes for some very good machines by Notka/Makro.....not rated deep enough for what you have in mind. You may want to handle a few if you can find some to try out. Some are fairly well balanced for beach use, others are awful out of the water. Try using a Garrett ATX on the beach for instance. Super heavy and awkward.
