Mike, for the price you would spend on the LCX-18/19 have you looked at either the Furuno 1650 or 1850? similar units to the Lowrance at a similar price and much better quality, over the past year or so I have sent in alot of Lowrance products for warranty work, there competing now with Raymarine as the 2 companies that send out the most "lemons" (IMHO) and unlike Raymarine who, if they can't fix it they send you a new 1(if its still under warranty), Lowrance has sent some of my customers "reconditioned" units to replace a unit they can't fix, I hate having to explain to a guy why he's getting stuck with a "reconditioned" unit to replace his 1 month old LCX-19 that he just paid $2000 for.

As for the Navionic's cartography, its good stuff, same as C-map or Garmin, that being said, my nod goes to Garmin at $149 as opposed to $199 for Navionics or C-map.

Furuno gives you the choice of Navionics or C-map