GPS Software

First: I'm 82, ex over the road driver. I primarily use a Rand McNally Paper road map. However, due to age, I find myself missing turnoffs and road information signs. We own a 25' motor home towing a Honda Civic. As you can imagine, a wrong or missed turn off can entail much trouble. To the point; I have a Dell mini 10, netbook, Windows 7, with an external CD, that I am using for a display. My problem is Software, Microsoft, Garmin, Copilot. Any suggestion as to which of these would best serve my needs? Earle

 

I personally had the most success with Garmin.