Nice car, bcenteno. Carrera classics look really good with that color (looks like Atlas?). What other options did you get?
First twenty seconds after cold startup can sound like all he11 breaking loose. At cold startup mine does all or some of:
1.) a metallic rattle/vibration for a few seconds (exhaust warming up)
2.) clackety tappet/valvetrain noise for five or ten sec (oil circulating & reaching all surfaces--my C2S makes this noise ONLY if the car's been sitting idle for >48 hours),
3.) popcorn sort of percussion from tailpipes while idling for first ten sec while the cylinders clear...I don't object to this sound, sounds kind of bada$$ actually
All above are normal-- in my opinion.
If the metallic rattling thing persists after the first 20 or 30 seconds beyond first week or two of ownership, stop at your dealer to have exhaust hangers/underbody shields checked for rubs.
Congrats. I took the liberty of resizing your photo 40%.