I just got back from a trip to Barbados, where I used my Infinium both for relic hunting and on the beach. The whole island is just coral stone (no volcanic sand), so it was quiet as a whisper until it hit a target. Thus the 14'' mono was the way to go. I have had tons of experience using SD's and a GP on beaches and found the Infinium to go at least as deep. And the discrim on the Infinium can be somewhat helpful if you take the time to "learn" it. The real advantage is of course the waterproofing that allowed me to detect in the water and right through a rainstorm. I have not used the Infinum in the goldfields yet, but it is certainly the finest relic/diving detector on the market. I am eager to see how the rumored White's PI can improve on it. True iron rejection would be the dream!