the "K" is technical name to indicate models. the latest model
is K12, earlier ones are K11, K10, etc (not sure about
before).
cinnamon interior matching the crystal blue look weird leh (at
least to me), dunno about the rest. do note that change colour will
cost you $200, maybe they will still charge you even before coe,
you can try bargaining. actually cinnamon interior by itself is
also quite nice, also wont dirty easily, except that gotta match
the exterior.
if you are not too senior (age wise) go for the bright colour also
nice. the bean after seeing it on the road, not quite like what i
expected leh, still very nice. 
