That is a lot of coin for a Garmin road gps. Garmin is slipping in quality and their latest offerings really show it. Aviation is still top shelf, but little to none of that focus makes it to the 'lessor' models.
For slightly more I bet you can get a used iPad with a beautiful, large display, an infinite number of additional features, full GPS tech on board, and great mapping (cacheable) software like the much loved Motion X Drive. I LOVE the iPad for nav duty and use it all over Alaska whether I'm in the field, air, or car.