TomTom XXL 540-S GPS Navigator With 5" Touchscreen

I am planning on making a trip across the USA. I hate flying and refuse to fly. So because I am going far, I need a really good GPS to keep me on track. I am pretty good with maps, but you can't always rely on maps to help you. Maps change due to a lot of things. This is why I am planning on getting this GPS. I think it will help me out a lot. I will also bring my map with me as well.