I am considering the purchase of a K3 but I am having trouble finding information justifying the expense for features the radio has over what I have now. I am looking for some input on advantages/features not found in the Icom Radios, IC-7800, IC-7700, IC-7600, or the 756 PRO III. With the exception of cost, has anyone given up their Icom for a K3? Jerry W6XI