Is this the right GPS for me? I don't really know much about handheld GPS units. However I'm hoping someone can just give me a simple unbiased opinion. All I want is a GPS with a large screen like this tablet size to mount to a rally style dash. I want to be able to create tracks off of Google Earth from my base, and import it onto the GPS to use in the field with alternative routes preset as a backup. I want to take this GPS to some really remote places, I have a SPOT emergency beacon, and no need for any of the fancy extras like 2 way radio or mp3 player, anything like this. Will the Earl do the trick?