Just found that my Eagle Fishmark 320 is dead. The transducer cable frayed and he unit wouldn't work. I knw I can replace the transducer cable or around $75 but my wife doesn't know hat and I'm thinking of using this as an easy excuse to upgrade. My question is the DSI worth paying the extra $200 or should I just stay with a black/white unit that just gives me depth and identifies drop offs. Don't know much about them so any advise is appreciated. Thanks.

http://www.bassresource.com/bass-fishing-forums/topic/116822-fish-finder-advice/?hl=%2Blowrance+%2Bdsi#entry1278224

 

http://www.bassresource.com/bass-fishing-forums/topic/116535-i-need-opinions-on-a-gpsfishfinder-combo/?hl=%2Blowrance+%2Bdsi#entry1277029

 

http://www.bassresource.com/bass-fishing-forums/topic/115839-lawrance-mark-4-dsi-a-good-first-fishfinder/?hl=%2Blowrance+%2Bdsi#entry1269918