Congratulations on your commission, will you be in flight training ?
OK, as regards your "cockpit" in the Crossfire, I also considered Cedar until a freind of mine who has the same colour in his wife's SLK said it can become a bit tiring - especially the wheel. I don't particularly like the light grey interior although it does go well with SSB. That leaves the all black which at the end of the day is always a safe, but elegant choice.
As for overall taste - the RX8 is too,well, Japanese looking and although the 350Z has the looks to match its performance there are a lot of them around (in multiple guises as they attract the tuning fraternity) so the Crossfire maintains a certain well bred aloofness from the other coups around offering great style, quality interior, and an engine that has plenty of punch for todays traffic and can either cruise quitely (not so easy in the 350Z) or snap quickly to attention for fast lane changes without shifting (impossible in the RX8). Buy it and enjoy.