I am trying to reduce the gadget count of my back pack. I have been looking at updating my GPS unit (an old Magellin 2000) to something a little more current. So I figured why not go with a Garmin Rino? As I got to looking at the Garmin Rino 530HCx I see it has a barametric Altimeter. I reviewed thier online manual and I see it has an ambient barametric pressure mode. This begs the question, how accurate is the ambient pressure sensor of the Rino compared to the Kestrel? Garmin is claiming the barometric Altimeter accuracy is +/-10 ft. I am thinking I can drop my $$ into one unit that will give me local pressure, GPS derived altitude, and FRS/GMRS all in one. I see that you can purchase an optional 4xAA battery pack to operate the unit, which has a certian appeal to me. The bottom line question is, is this a bad idea?