21 years and no map updates? Anything you buy will be much better than what you gave now, and have many more features than you may want, or wish to learn. In my opinion, Garmin is still the gold standard for GPS based mapping devices but they are not infallible. I have a Garmin 760 and use it when going long distances in the RV. One of the best features is you can update the thing wirelessly, no pc required.
A word on Google maps is if it can’t get me to my house, why would I use it to go somewhere else? I live on a main road and Google send delivery drivers down a wrong road, even when they are on the right road already.