I think the E9X M3 certainly more aggressive than its non-M E9X counterparts when you compare the E30, E36 and E46. And for some reason, I think it would look horrid in yellow.
Fire orange is good. Maybe I am biased but Monte Carlo Blue is the color that suits the E9X the best.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red