I'll be upgrading my sonar soon and want some opinions on the above units. The Lowrance unit seems pretty reasonable considering it has 320 X 320 graphics compared to Garmin's 240. According to Lowrance's website, X-88DF is comparable in every other area such as power output, transducer, frequency, etc.

My other question is how important is having a duel frequency for the salt? I ask because I only fish the salt for a couple months in the summer for kings and coho. I target fish in less than 150' of water. Is it really worth paying the extra money (albeit only about $50) for the dual frequency in that situation? The rest of the time I fish freshwater lakes and rivers.

How many of you with dual frequency units always use the split screen and monitor both freqs simultaneously?
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Tent makers for Christie, 2016.