I voted for Santorini because I like individual blues. If you are set on your choices, that would be mine.
If it were me and I was set on blue, I'd seriously consider (glossy, not frozen) Monte Carlo Blue and perhaps Laguna Seca Blue. Actually, MCB would probably be my choice.
If you are going the red route, I would much rather have Imola Red (best BMW red ever!) than Hellrot.
As for the wheels, rather than painting them black, why not have the GTS wheels installed at the port? Maybe you want gloss black rather than matte...??
2015 ///M3 | BSM/Full Black/CF | DCT | Silver 19s | Executive | Lighting | DAP | Adaptive Suspension | HK | Enhanced USB | Tint
Past BMWs: 2014 550i, 2013 M3 ZCP, 2012 535i, 2011 E90 335i, 2009 E90 M3, 2008 X5, 2006 330i, 2004 330i