I recently acquired a '99 bass boat with a 300TX on the troller and a Wide One FF at the console. Are these good units? The display is 64X128 pixels which is less than the Lowrance that was in my old boat which troubles me. Do the newer Humminbirds plug into the same mount as I have now? Should I look at a different brand? <br />My budget is $200. Which should I replace first?