I thinking about buying a tesoro. either a vaquero... cibola.... golden uMax..... lobo....Look at them before... but turn away because of the review I read...that they are not good on deth...... but want ask people that know about them... the ones that use them .......I hunt old silver and gold coin,, and jewely.. not a relic hunting and hunt mosty old home sites and church and parks...the ground is mineralize soil..what is the pro and cons about them..How is the lobo on silver coin and the other one on gold... Thanks.