Get a blue auto.
Nah just kidding. Get the white 6mt.
Source: I have a black 6mt.
Black is only a bitch to keep clean if you care. Dirty car is dirty. White is my preference, but I was buying used so my choice was limited. If I were ordering new I'd get neither.
'07 Z4 3.0iS White/Saddle - Sold | '05 330 ZHP Silver/Grey - Sold | '06 330i SGM/Black - Sold | '07 335i Jet Black/Saddle - Sold
Volks are SOLD | '03 330i ZHP Silver/Grey - Sold | '11 X5 35i Sparkling Bronze