it depends on what/where you want to use it
if you are only going to use it in one boat, then a fix mount is the way to go
but if you want to use it in other boats or at home or on the ice, a portable is the way to go, you can buy a portable with just as many features as a fixed mount, you can buy a amplifier to get top watts if needed and most important of all is the antenna. It is really what makes or breaks a radio the better the antenna the better the radio will work and there is an adapter so your handheld hooks up to a fixed mount antenna