A lot depends on if you are willing to learn a new/different brand than what you know. What are you requirements. They all are comparable for the most part. Everyone has their favorites. Are you able to transfer all your waypoints easily.
A lot of guys prefer the big screen units, for me I prefer 2 units that equal or exceed the big screen display. This can be a cheaper option, but this way you also always have a back up, zoom in/out is much easier, also adjusting settings. But that is me.