i just read this thread and saw this post by arizonaames...
http://www.treasurenet.com/forums/beach-shallow-water/352277-beach-detectors.html
is it true there are only 2 MD worth buying for the beach?? the more i learn, the more i realise i do not know... hahaha
It all boils down to where you are going to hunt and how much money you have to spend.
There are metal detectors that are made to hunt a specific way. Some examples are gold detectors and underwater detectors.
Then there are metal detectors that hunt everything from gold to coins, to iron artifacts. It will always be the better choice to select a detector made specifically for what you are hunting for in the environment you will be hunting in. The problem is that a lot of hunters hunt for all different things in all different environments and either can't afford a specific metal detector for each type of hunting or don't care to learn how to use all those different detectors. So they go with a metal detector that will cover the whole spectrum of what they want to hunt and where they want to hunt. Which in that case means you will have to find one within your budget that will find all types of metal and work best in the areas you plan to hunt in the most.
I have found that for an all around metal detector that will hunt well in almost any environment in the $600-700 range the AT-Pro worked out nicely for me and I am happy with my purchase of it.
Will it work on a salt water beach? Yes if you learned how to use all the functions of it well.
Is it one of the best metal detectors you can buy for salt water beach detecting? No, that's why I bought an Excalibur and took the time to learn it. But the salt water beach wound up the place I hunt the most so I wanted one of the best metal detectors for salt water beaches.
As far as the Sand Shark, I don't own one to comment.
If you don't need a waterproof metal detector there are plenty of other all around metal detectors to choose in all different price ranges that have more and less bells and whistles. Some people are brand loyal while others are not.
There is no such thing as "the best metal detector". Some are better than others at finding certain things in certain areas.
Once again, It all depends on how much money you want to spend, where you are going to hunt and how much you want to learn about the machine you choose.