There are so many chartplotters on the market I am driving myself crazy trying to figure out wich one the best value for me. I have narrowed it down to some of the features that I think would be important They are:

Cost - every dollar counts

wireless connectivity - so that I can connect a large tablet

bulkhead mount

sunlight viewable

included charts eg navionics gold

NMEA copmpatable so I can use coursemaster 85i, wind and speed

worldwide base maps - I am hopeing I can use this in conjunction with the navionics app rather than buying charts for all the places i might go. ie use the app or a paper chart for a detailed view then use the lat an long to put a way point on the base map. (is this a dumb idea?)

With all these criteria in mind it seems the 5" or 7 " a series Raymarine (provided I can load worlwide base maps) is a good option but there might be something I am missing here because detailed comparisons between all the models are hard to come by,

I have never owned a chartplotter so I would appreciate any advice.