If you look back in the posts here on this site you will see that this question has been asked several times. You wil find that when it is asked, most people will tell you that the detector that they are using is the best. Therein lies your answer.
There is no best detector. There is only the best detector for you. You obviously have found one that does not fit what you are looking for so that eliminates one. Unless you have a ton of money, I would not suggest that you buy what we recommend. If you do that, you may go through three or four more before you hit the homerun you are looking for.
I have said time and time again that a person looking for the Silver Bullet, Gold at the End of the Rainbow, etc., in a detector needs to make a list of what they want in a detector. What is important to you? You should give it lots of thought and then write these things down. Then start reading every user review, etc., you can about all of the beach a water machines. Write down what you hear that you like about them and what you hear that you don't. Compile this list on every machine then go back to your original list of what you are looking for in a machine. Your answer will be there somewhere in your lists. There will be one or two machines that will have much of what you are looking for and there will be several that will have much of what you are not looking for.
Nobody on here can tell you the best. My pic was an Infinium for water and a Sovereign for dry sand. Pretty amazing that these are two totally different machines but there was a reason. I tailored my pick to the lists I made which was also tailored to the areas that I normally hunt.
Make that list of what you want in a machine, do lots of reading for several days on reveiws of all the machines and articles where people have written about them. Stay with the major name brands and you will find your answer.
Good Luck,
DaChief
. 
