well, i own a pearl white IS200 sport and i think it looks great.
agreeably, few cars suit white (in my opinion), but the IS definitely does. i personally havn't seen many/any in my local area and its also good to be unique/different.
matt/plain white is an awkward colour i think, but the mettallic finish on some white cars (gold pearlescent in my case), really does do the business.
but, at the end of the day, its each to their own. :D