I need to equip my boat with a vhf radio and can't decide on a handheld or fixed.Will be boating on Kona side of Big Island(Hawaii).I realize Handhelds don't have the range of fixed,but could it be attached to an ext. ant?I like handheld because you're independent of boats power source,you can drop in batteries as you need them,and the radio goes with you.Been looking at Icom and Standard Horizon.Know a good online site for a package deal???