I run the Lowrance HDS 9 gen 3 two on dash side by side vs split screen linked together easier to see out windshield and a Lowrance HDS 9 gen 3 on bow with terrova trolling motor works good. I run two transducers in rear one total scan and HDI skimmer and built one in the terrova on bow built in which is 2d works great. Another great place to buy is russellmarineproducts on line used stuff in all models is great priced he takes tradeins and sell's new. Guys allways have to have best and his used is warrantied. Save thousands unless you don't want too. BY way update firmware on the lowrance's is big plus. I have no troubles. Lots of people like Garmin and Hummingbird too. What ever you have been using and are use to.