I'm in the market for a good beach machine. I plan to use it mostly along the shoreline and in the surf (no diving), so submersability is not a requirement. I also want to be able to use it on the dry sand ocassionally - the beach I hunt at is fairly clean with very little trash to contend with. I've read good reviews on the Garrett Sea Hunter II, the Whites Dual Field, the Tesoro Sand Shark and the Fisher CZ-21. I would appreciate your thoughts and recommendations for my particular hunting criteria.