Hello to all! I have a question, How does the AT PRO do on coins? I use my GTA Detectors with good results ( love the bell tone! ) would like to coin shoot in the rain, is the learning curve going to be a problem? being waterproof would be a plus! thinking of replacing my 2 GTA 1000 and my GTA 500 with a 1500, 2500 or AT PRO. what are your thoughts? Mike.