I have the Navman N60i.
It's a great piece of gear and has never sent me wrong yet.
I like the navpix feature and have used this a lot when out and about. If we come across a site, pub, attraction or anything else that we might like to visit and spend more time at. We use the navmans camera function, this stores a picture and the map reference of the location. When we want to go back there, we simply find the picture and press "go to". Simple.
You can also upload and download these pictures and map locations from the navpix website.