Is there a GPS device that can do this?

Okay, I want my GPS to act like google maps. That is, I want it not only to identify my route, but to show the entire thing to me. (Preferably the way google maps does it, with step by step directions in written format.) I also want it to show me alternative routes, and to allow me to alter a route slightly.

The Garmin 1300 that I have now doesn’t seem to do this. I can peek at the route on a map, but I can’t see any exit numbers or specifics until I’m at that point in the trip. And apparently, I can’t ask for an different route or change an existing one (which is a big problem when you come across unexpected road work).

Does this feature exist? It must, right? What is it called? The electronics guy at Walmart had no idea.

There’s a small chance that my current device has this feature, and that I missed it. I spent a long time looking, though.

Thank you!