Never owned a whites before and I have a chance to pick up a classic 3.I intend to use this detector for coin shooting only,as I have a sov for my other detecting fix.Depth is really not the issue here.Now I need to know if this machine is hot on Canadian coinage?Can I tell a pull tab from a coin or ring?Any likes and dislikes.If you have any other tips it would be appreciated. Thanks for your responses.Marc