All depends on your budget. I would include the Dual Field in your list of potentials. I have an excal, dual field, as well as 4 other water machines and nothing I have or have owned will touch the depth of the dual field. Ths coil does float on the White's but I dont mind because of the finds I am making with this machine. I hunt on Lake Erie, also fresh water. I am beginning to distinguish bobby pins and larger iron from coins and deep jewelry. I've only had the dual field for a couple of weeks and I figure by next summer I will have a very good handle on it. I got a teriffic deal from a Findmall sponsor, Don Dodson, North Georgia Relics.