Shane I'm a bit confused by your comments. You might be right, but you might have also misunderstood what you've read elsewhere.
My understanding is both WiFi and 3G models have the same GPS capability. I am quite sure this would be the case.
However GPS without 3G would be quite limited and perhaps this is where you have got wires crossed - think about it: If you are driving along a road and you have 3G, you can follow yourself on Google Earth and see what's around you. If you do not have 3G, you can only use cached (previously downloaded while in a WiFi zone) data so it's likely you won't have the data for where you are at the time. If you have taken a weekend drive to a town and want to find a cafe without 3G you wouldn't be able to locate yourself on Google Maps because it won't be able to download the map data (it will show your blue dot very accurately on a grid of gray lines
) where as with 3G you can use Google Maps or AroundMe (or such apps) to find places to eat or things to do because they will be able to download map data through the 3G network.
Personally I would only buy a WiFi-only iPad if it was for use exclusively within my home or office. As soon as I knew there was a good chance I would be taking it out and about, 3G is a must for the sake of convenience. I use 3G a lot of the time, and having that transparency of not having to think about if you are in a WiFi zone or not, you're simply always connected, is great. Also even while at home, if the power goes out (storm of bush fire for example) I can find out information on the iPad because it has 3G.
Roger.