Chartplotters

[dlb511]

Yeah, I know the money kind of limits me, but i just can't afford more. Garmin seems to be the most popular from my research, but they have a bewildering list of models and the numbering system for the models does not correlate to any set of characteristics that I can figure out. When I read the descriptions, about all I can understand is the size of the screen and some are mapped for freshwater and others are for salt. What about a built-in antenna versus an external? Does a built-in have a lot of problems, or is the difference negligible? I will just be using it inshore so best resolution would be a consideration, I don't need a lot of extra bells and whistles. I would like color because they say it is much easier to read and my experience agrees. I have no problem with buying an obsolete model if I can find one and it will fill my needs.