GPS/Fishfinder combo for 17' whaler

I'm looking at replacing the inexpensive fish/depth finder on my 17' Montauk with a GPS/fishfinder combo unit. My budget is $600 or so, and I'll be using it on the tidal rivers and coast of NH. Anyone recently purchased a unit that they can recommend? I probably am looking at one that's something in teh nieghborhood of a 7" screen. I'd like touchscreen, but it's not a dealbreaker if the controls are intuitive and simple to use.

One question, a lot of the descriptions and reviews talk about lake maps, but what about coastlines? Are those pre-loaded? I assume, but just wanted to specifically ask.

 

Most units only have basic maps that come standard and you have to pay a sometimes good chunk of change to get the real deal. I use a Helix 7 and my only complaints are the lack of side imaging and screen size once you start running multiple views. Usually I just go with sonar and down imaging but sometimes it's nice to have the GPS map up also. If you have an electric trolling motor consider a fish finder that can network with it for more precise trolling guidance.

I haven't used the Humminbird coast charts but their Lake Master charts are quite good.

https://www.humminbird.com/learn/mapping/coastmaster

 

To close the loop... I got a Garmin Echomap UHD 94 sv. 9" screen, sidescan and loaded with coastal maps. did a bunch or research and settled on this one. A little more than my stated budget above, but that's what unexpected bonuses are for.

 

sweet setup.

my Lowrance got me back to a ramp pretty easily the other day.