I mainly use (when I do) a Whites Surfmaster PI Pro. Works good for me, has the diver coil which doesnt float, and of course you have to dig everything that beeps. No disc, but some things make a different sound, but that also could mean its shallow too. I have the control box on a belt on my waist. I have been behind others and found stuff, (gold rings, clad coins, keys) but I think they had some kind of discrim switched on. I have another Whites PI that was worked by Mr Bill, but it doesnt have the diver coil, and wants to float slightly, so I dont use it, But it works just as good. At the metal detector club I belonged to years ago, we all brought our detectors in. We checked all on all kinds of stuff. The one (at the time) that would pick up a thin gold chain best, was a Fisher PI. Les (Les West Coast FL) used a Sov Minelab with a big coil Wot, that was also hot on gold, but the top wasnt waterproof. He had a waterproof case I think. I think he went to an Excal since then. He was still hot on gold, but was out there every day. I do know many like the Excal. I'll stick with the PI, and dig it all. I dug a can once, and it was in a hole that was refilled, showing that it was dug and the jerk threw it back in, and after taking the Orange Crush can out, I detected another hit, and it was a diamond ring under where the can was. In virgin sand. So, it shows, to remove the trash, check your hole again, and maybe you will make out OK. I also use a Riellys Treasured Gold Scoop, from Pompano Beach, FL. Its an all stainless, heavy duty scoop.