I've also got a CarPC installed in my Z:
Car Computer / CarPC - Upcoming Build and Journal
Like pokeyl said - I'm also looking into installing a second screen. However, my primary is currently in the Double DIN slot, as you can see. I'm looking into a way to have a custom fabricator put another bare touchscreen in the cubby hole door - leaving the function of the cubby hole intact. Worst case, I'll lose the cubby hole.