Hi, I have a White's MX7, I like it, but want to try something different. I live in an old farm house, and mostly just detect around my house....I have no other places to go. There is tons of iron here, and I have to use the 6 inch coil on my White's, to sort through the iron. For some reason, I have never found a coin older than 1940 here, and the house has been here since the 1860's, possibly 1850's. I would like to see how the 600 would do, I am on a budget, so the price of the 600 is about my limit....I found one on Amazon with two coils for $600. Any tips, suggestions, advice welcome.