Philski said:Out of all the brands. Get the best Minelab you can afford. SD 2200 up, if you can afford it. For cupro, Gold, bronze or even Silver, Even the cheapest kids ebay detector will find a patch on the beach surface. Finding small gold at depth takes a sophisticated machine and the minelab does that better than anyone else and has done for 20 years. with awesome battery life and discrimination and that golden sound. Remember when the wave of gold finds hit in the 80's? Better Depth, is the reason. The only downside is then you have to dig it out further down.
Better penetration in mineralised ground and smoother operation are the biggest advantages of the pulse induction (PI) Minelabs. Generally as you go up through the models they have released their performance and ease of operation improves. The GPX series has fantastic sensitivity to small Gold. Much of what I have found is only 1-2 inches deep so it doesnt mean you are always digging large deep holes.
The coil that is used also makes a difference. Generally speaking larger coils are best for larger and deeper targets. Smaller coils can be worked close to the ground and often find small bits larger coils miss.