Simplest out there would be a Tesoro Compadre. Better would be the Tesoro Mojave. Mojave is a little less "turn on & go", but still pretty close. Mojave is also a little deeper, has two ground balance settings, and has adjustable sensitivity. Tesoros are also USA made with lifetime warranty. Both of those mentioned have excellent discrimination. There are plenty of other Tesoros too, but those are a couple of the simplest and most cost effective they make.