Without a doubt go with the Lowrance H20 in monochrome or if you have the $$ go the colour unit. They are very precise and run the Navionics chip as well. We use their units on the boat for tourneys and they are easy to use, waterproof, come with the cigarette adapter and as I said excellent for bringing you back right to your spot. Lowrance customer service is great and also right in Mississauga. Fishing World in Hamilton had some at the store last week as well as the Navionics chip.