Have one of each coming this week, and trying to determine what coils I should have to go with them in this Georgia red dirt. From reading is a must, and smaller than factory? One I keep seeing as being fairly good is the Detech 8x6" SEF Butterfly Search Coil. Open to opinions, will be relic and coin hunting in all sorts of areas with old homesteads so I want the best cha conce of deep accurate hits