After having a dark blue 300 I now have a silver 650. Sure, it looks technical but it is an electronic device, after all. I don't find it distracting at all and I certainly wouldn't deface it with some plastic skin. It does look splendid in its black Noreve leather cover (IMO the most beautiful cover available for the 650):
http://www.noreve.com/langue/en/prod...ther_case.html