Suncoast Kid specified only four Freq's, to choose only one of the those four, if you could only choose one. I said "19", kind of in the middle. Now, having said that, I do prefer a Multi-Freq. detector, handles salt water beach WAY better than a single freq., it's just the nature of the beast, and there could be times that you might choose a single Freq., such as 2,4,10,15,20 or 40 for something specific, also I believe a Multi handles a high mineral content better than a single might. I used single Freq' detectors for years, that's what we had, until I bought a Minelab Safari, a Full Band Spectrum detector, great detector, but it did have a SLOW recovery speed. Anyway, we do not know what brand and model Suncoast has, or if he is thinking of another in the future. Again I said "19", but to "recommend" something? I'd say a Multi-Freq. detector, because it ALSO give you the option of a 5 or 6 different single Freq's. Whew, was I long winded in this response or what.