I watched the show with great interest, but I don't feel like upgrading. I like my machine the way it is. I think I do okay. No one gets it all. One thing I thought was very interesting was the demonstration of the ferrous and non-ferrous targets side-by-side. One channel was in all metal mode and the other channel discriminated out the iron. The loss of depth on the non-ferrous target was quite noticeable (due to the discrimination). Looked like several inches to me. The demonstrator held the coil at least 10 or 11 inches above the nail and it gave a loud signal. He had to hold the coil about 6 or 7 inches above the coin just to get a faint signal. Was I imagining that, or did anyone else notice it too?