You wouldn't be able to put a HU in the top cubby regardless of trim package. There simply isn't enough space to work with without doing some major re-engineering.
Adding an aftermarket HU is possible in the bottom cubby and many here have done so, but you need to be aware that the touring package comes with Bose audio. A dash kit will be required and the Bose wiring can potentially make the install somewhat more involved. To get a better understanding of what you will need to do I recommend you visit this sticky:
What to know about Bose
Welcome to the forums and good luck with your purchase!