Garrett AT Pro
Iron audio is the feature that makes this a relic machine rather than a park machine. Instead of a hard accept/reject on iron, it gives you a distinct low grunt so you can choose to dig it — which matters enormously on a site where buttons, buckles, and bullets sit in the same ground as nails and shrapnel.
Genuine depth and solid mineralized-ground handling round it out. Waterproof too, for the creek-bank sites relic hunters end up working. Read the full Garrett AT Pro review.