I will be looking into deep concave custom ordered wheels from ADV.1. To me, they are among the best you can find (they will do whatever offset you require, and whatever finish you like). Look at their site, amazing products! I'd opt for a gunmetal/titanium finish, rather than flat black.
http://adv1wheels.com/adv1wheels/index.php
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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