Looking to purchase a new fish/depth finder for my '88 FourWinns I/O. I will be using it in shallow/fresh water (rivers/lakes). Which of the following would any of you recommend.<br /><br />Garmin 160 -- 400watts(RMS), 200KHz, 160x160 pixels, $189 (-$25rebate) = $164<br /><br />Raytheon L365 --...