I second the GM 1000 (Gold Monster) have been using one since they came out and it hits vary hard on vary small non ferrous targets I.E (Gold,Aluminum,Lead, and Brass)
and its probably the easiest gold detector you will ever use
I have dug non ferrous targets like spent lead bullets down to around 10-11 inches with it and like I said when you get the coil over non ferrous targets it bang real hard and loud
also like stated no detector will see flower gold but nuggets is a different story