GPS is built in, and yes it out performs the D3, I have also owned that. Start up time for this isn't the greatest, the maps are stored internally on HD.
What year are the maps that are currently loaded on there and is it both east coast and west coast maps?
Not sure on the year, but I do know it is the entire US & Canada, as I have driven the entire US and a bit of Canada.
Okay lol I am waiting on my customer to get back to me, he has the D3 so this would be an upgrade for him.