You can always add grain in post processing if that's your thing, usually with better results than the results of a noisy hi-iso image.
The importance of white balance is the reason I recommend having that setting right on the camera, not buried in a menu. If your white balance is too far off, you can blow out a color channel, and then you're stuck in post. Sure, you can adjust almost anything in post, but I still think its better to get it right in the camera.
1999 e46 328i Ti Silver / Black[retired]
2007 e90 335xi Jet Black / Black[retired]
2011 e70 X5 35d Vermillion Red / Cinnamon
2011 e92 M3 LeMans / Fox Red extended