U guys who can afford the M3 - lucky dogs...
Anyway, I had this colour (beloved Sparkling Graphite Metallic) on my former 325i sedan. It's way better than Space Grey. It's the closest thing to gunsteel BMW currently offers. The only minor downside is that in direct sunlight the colour gives-off a bit of a mauvish hue - not that big of a deal, though I'd take the older gunsteel grey (or whatever it was called a few years back). Your car looks great with those dark grey rims. For God's sake, don't put in a red interior. Consider staying with Black (not bad at all) or perhaps even saddle brown??? Consider burl wood trim. Anyway, great car - enjoy!