Get the one that you like best. If your old stuff is SeaTalk-1, you can void expense, by staying Ray and up convert the old stuff to ST-NG.
Having delivered boats with all three brands, they all have good features. The Ray and Garmin
have easier to learn menus- but I really like B&G- problem is by the time I learn the menus, the delivery
Avoid 100% touch screens like the plague. If you get a device with knobs and touch, that kinda works. Those models let you lock the touch screen so if touched it does not change anything.