I pondered about this for all but 2 secs. Went with CF and never looked back. I think on the VO will look dynamite, and you don't have to worry about cleaning the soot that will be visible on Ti tips. Here is the thread of my install with plenty of pics (and dyno).
http://www.1addicts.com/forums/showt...ight=akrapovic
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2011 BMW E82 1///M: AW, all options; Renntech, Akrapovic, Forge, P3, RevoZ CF bits, many mods
1988 BMW E30 M3: Hennarot, S14, stock
2018 Porsche 991.2 GT3: PtS, CXX, LWBS, PCCB
1998 Porsche 993 C4S: Zenith Blue, last aircooled widebody, Bilstein PSS10, Fister II + Fabspeed exhaust
2008 Audi B7 RS 4: Sprint Blue, Audi Exclusive Euro Bucket Interior, Premium+Titanium, many mods