Trying to decide on a second metal detector. I have a Tesoro Sand Shark that I use on the beaches and in the water in SE Florida. But when I go other places I don't have anything I can use to eliminate trash. I am considering an Excal 800, but I don't know how the discrimination is for land work. I need to get a machine that can work in salt water and be useful when I am out of town where there is no beach. Thanks.