I have a Whites coinmaster and a Garrett Ace 350. I am thinking about selling both the machines I have but need to get some info. I am torn between a ATGold or a ATpro. Is it worth the extra $100 for the ATGold? I mainly just hunt yards and tot lots, but would like to try prospecting, but if the ATpro will find Gold Why pay the extra $100. Most videos I have watched the people owning both mainly use the ATpro. need some good advice. Thank You