Looking to put a sonar on my trolling motor.  I have a Lowrance hdi 4 that I have mixed feelings about that I use behind the console and am looking at the Garmin 501 c and the Garmin 551c to put up front.  Any feelings on these sonars? Is it worth the extra $40 for the 551C or should I go with the 501c?  Never owned a Garmin.  Or, should I stay with the Lowrance.  They have the 4X with CHIRP for $169.  Just looking for opinions and experience with these units. Thanks!  

Neither of the Garmins have GPS. 

The Lowrance Elite 4X Chirp doesn't have GPS either.

Why are you considering them if you want GPS?

 

You have to add another $100 to get to a sonar/GPS model.

Lowrance Elite 4 Chirp

Humminbird Helix 5 Sonar-GPS

Neither of the Garmins have GPS. 

The Lowrance Elite 4X Chirp doesn't have GPS either.

Why are you considering them if you want GPS?

 

You have to add another $100 to get to a sonar/GPS model.

Lowrance Elite 4 Chirp

Humminbird Helix 5 Sonar-GPS

Titled it wrong!  I meant Sonar.  Mental cramp! I'll edit it.