[HitmanHearns]

Any tips or suggestions on which route to go?

I like both. I like the CF a lot, but I know I would have to apply it as theme to the car. Also, I've never had a carbon fiber part on a vehicle before so I am not sure how they last in terms of keeping them clean (and not fading).

I have only seen online photos and I feel like the pictures don't do justice compared to real life. This is my first BMW, so I don't have many in-person experiences with exterior mods (CF vs matte).

There is also the paint option (painting it black), but haven't really considered it.

This would be for a Alpine white F30 m sport rear bumper.

What would you guys suggest? Flame me if necessary

[RodDT]

I think you should go with what you prefer. I am a carbon fiber guy... I just like the pop with the white. And any carbon fiber part will pop more to the naked eye. Unless picture is taken with a good camera and good lighting. As far as maintenance, it's very straightforward. Just keep it clean like the rest of the car. I will install CF rear diffuser in the near future.

[Exterminador]

This is a personal preference that only you can make. You did make a good point about making a theme of it if you go CF. Unless I was going to put additional CF I would go matte.