Hey Jim, I hear you are the expert on the area and topic. Out of the following detectors, which is the best for the area around the Rands Mountains in Kern county. Minelab SD2200 (d or v2), Minelab GP3500. These are the models I have found available in the price range I can afford. Based on online reading, I believe the GP is the better for various reasons but it also costs 2x the SD models. Let me know and thank you. Maybe we can meet up one day when it gets cooler out. We were at our claim today (early hours 7am-noon) to haul a ton but the roads were washed out so bad we only ended up gettin