i can guess that those of you who are saying the cliched 'who cares what others think' have not worked in a corporate environment.
and it's not only about the 'oh, we must be paying you too much' thing, within corporate culture there are certain unspoken rules, by being a young kid who drives a nice car, there is no way your more experienced, older co-workers and especially your superiors are not going to think of you in a more negative fashion... yes, it is bs, but it's true whether we like it or not.
as for me, i'm 24, i currently drive a 2000 civic si, while my boss (engineering mgr.) drives an old ford escort (!) and his boss (director of mfg.) drives an 88-89 mazda mpv minivan (!!!). imagine when i drive up in the 330ci once it comes in...