Its a good blast, no doubt - in any colour! Don't seem to be too many silvers in the UK. Dealer made it out to be some special colour - but its actually just universal silver. Which is fine.
Make sure they give you the nice Nismo handbook folder. They're short of them apparently, and Nissan had to send mine separately.
Dealer threw in a Tribos treament, which was well worth it, unless you really like waxing your car. I prefer to drive it :-)