Reapp,
There are many best detectors on the market. Some better than others and that's just any individuals opinion. I personally use an older Whites MXT, Garrett AT Pro, Technetics G2. My whites and Tech is not water resistance but the Garrett is. I like all three. They are fairly easy to use and learn and I have found a lot of items with each one. Which ever detector you use these mentioned or any other one out there on the market, I strongly suggest to also purchase extra a little 5 inch coil (snipper coil) for the trashy areas. The separation of iron verses the "good" items is what it does better than a 8 inch DD or larger coil. Larger the coil more the detector will not be able to separate the good from the bad. The smaller coil will of course take longer to cover the ground than a larger one but it is what it is.