hello im thinking about switching from the t2se to a safari or another multi freq unit i live in northern california and the t2se does not get very good depth about 7 inches max on coins we have some of the worst soil anywhere here. looking for some input from from you all im hearing that the safari will get as good as the etrac on depth and how does it do on saltwater beaches and is it well balanced and how long does a set of batterys last, thanks hh