You know I am so impressed with that little yellow garrett I can't help but wonder about the green machines. Like the gti 2500. and gpt1350. now is the 2500 just as good as an Explorer at finding deep silver? Is it a deep seeker? Also What about the low end garrettes that were around before the Ace 150 and 250.The ace 300?. Is that a better detector then the Ace 250 for deeper coins?