gps that will let me make route points

[Rangerscott]

Is there a gps out there that doesn't cost a left testicle and I can make/connect my own route points like you can in google maps?


I know there are ones that u can upload routes, but I don't know many people that pull off the road, bust out a laptop and make a route. I want to do it on the fly.

Ex: Point A to B goes through a set of towns but later I decide I want to go through a different town on the way, but am still keep destination B.