If i get a portable nav like the garmin nuvi for example..will it fit standing up when the dash plastic bin is in the open position? That was It will be in the same place as the factory nav? Will it fit inside when I close it when not using it (so people dont try to break my window to remove the unit?) Anyone know? From the reviews I've read the factory navi isnt all that great and I dont know if it's worth the almost 2k