Mark, I have seen your videos suggesting an upgrade from Nox 800 to Manticore. I'm thinking of making that move and wonder who you think is the best source for a new Manticore. I see different packages online (some with 8" & 15" coils) and recall you mentioning in your video that you considered the more expensive version to be worth it. Which model & package do you recommend? My main target is 19th century relics & coins.