I'd stick with the Mineral Gray... one regret I have on my sport line is not getting the M adaptive suspension, wife complains that the sport suspension is too rough now
Also, there's nothing quite like getting that car that you ordered for yourself!
And finally, I am a fan of putting mods on a while after getting the car... It's almost like another fun process of getting new clothes or shoes... not sure if that's something to consider as well.
Can't really go wrong either way.