Real bunch of bad dudes here, huh?
An Amazon Kindle isn't a GPS. It is a device that allows you to take a book, or hundreds of books, and digitally store and read them in a package somewhat smaller than a legal pad. It uses a dramatically different type of display. While monochrome, it is visible without regard to the angle of the sun. No, I don't work for them or sell them. I do, however, read.
I have and use a Magellan 4050 which is quite similar to the 3050. While it is often readable, it is a problem when the sun is high and bright, shining onto the display. It is a problem at high noon. Otherwise, I can read it. In the morning and evening it works great.
A friend has a Garmin Zumo and it was as washed out as mine. The technology is the same, anti-glare and "made for a motorcycle" aside, it is still a LCD. As to the beaches, I ride to many beaches in many different states. You aren't really limited to the state you live in.