I got the 650, I see they are sold out now.. Looking at the onxmaps, someone said the PC version lets you put it onto two gps's?
Only 1.
http://huntinggpsmaps.uservoice.com/knowledgebase/articles/391484-how-many-garmin-units-can-i-put-the-download-on
The primary advantages of the download vs. the chip are that you can view the maps on a computer without hooking up the GPS. In fact, you can download and view on multiple computers.
Also, if you want to put more than one set of maps on a chip the download version is the only way to do it. For example, if you purchased street maps from Garmin and wanted to put them on a chip, you couldn't add them to the onXMaps chips (you could but it would overwrite the onXmaps.) With the download version, you could send both the onXMaps and the Garmin street maps to your own chip and then view both sets of maps on the GPS.
That makes sense, so you can download it, view it on your computer, and save it to a chip and use in your rino then? If I follow you correctly.
Exactly.
Do you know, if I can transfer from one computer to another? My computer at home is really slow, so Id like to download at a different computer to take home.