I am going to Florida for two weeks in June and I want to dabble on the beach for at least a week or so relaxing and detecting. I narrowed my purchase of a PI machine down to a Sand Shark or a Garrett Sea Hunter. I know the Tesoro warranty is second to none but is that the only reaon I should go with the Sand Shark? I wanted to stay in this price range since it will be a casual machine for me.