I'd have to agree that while Smoke Silver is a great color maintenance-wise (doesn't show the dirt), it seems a little too conservative looking.
Like grandpas retirement-mobile instead of the sporty edge that Black would give it. I think the reserverd MB styling goes a little too stodgy with smole silver. Again, a totally subjective opinion in either case
I'm sure you'll enjoy either for their performance merits
Regards,
- Ryan