I use the PI PRO exclusively.. Don't buy into the hype it finds all the junk or you will dig and dig, if you know where to use it, you won't find anymore junk than a person using a discriminating machine. I know by sound what iron sounds like if you have the patience to learn your detector it can't be beat for depth.. The PI is my water machine, the DFX is my wet sand detector.
Remember its the person behind the detector that will make your hunt successful. I have researched all the beaches I hunt, I don't look for fresh drops.. I'm after old gold, I won't put the fresh stuff in the trash bag
but I prefer the old stuff and the beaches I hunt have given me plenty this year... Winter is my preferred hunting time when the sand moves out leaving old beach exposed in the wet and in the water.I don't detect much in summer.
I use my PI "only" in the water where there is little trash, Its not a detector for dry sand, most trash on the beaches is in the dry sand I don't hunt dry sand, I'm not a clad hunter, I'm looking for gold.. I hunt deep water troughs and areas where the currents and tides have depleted the beaches of sand and left shells and rocks exposed.
If you want a PI use it in the wet.. My set up is PI water DFX wet sand and leave the dry for grandma and grandpa lol..
The BeachHunterID is fine for your needs you can use it freshwater/saltwater/dry/wet.