Thats the one I got told off about for saying the discrimination (discreet discrim.) was so discreet I couldn't find it.
What you have to bear in mind is that Minelab seems to work better on the west coast, Fisher CZ on the east (but the Fisher would need to be used in land mode to have any hope of picking up small hammered silver which means no CZ20 as its locked in salt mode).
As I travel the country a lot I use the Deepstar as the first option, Goldquest SS as second, then the Sovereign with 14" Penetrator or 12" Sunray. In heavy rubbish the Beach Hunter I.D. comes into play.