I live at the beach, lots of civil war history here, also lots of tourist losing money, rings etc.....so I will be detecting on the beach, wet sand and dry and in the woods at old home sites etc....I have a whites prizmIII now and it has been excellant, found a lot of loot, and it gets ok depth....but I want more horsepower....whats the best detector I can get for 700 dollars?....looking at a whites matrix M6 what do you pro's think?