Is that white bumble bee staying white? If so I probably would not introduce a 3rd color like gunmetal or titanium. I would probably stay black or brushed center. If there was no white bumble bee, either black or a grey titanium or gunmetal will work fine, you will just have to decide if you want to introduce a second color. If you color match the bumble bee to the center of the wheels, gunmetal or titanium centers with a matching bumble bee will be smokin cool detail.
As for mesh or spokes, I find black mesh wheels at 20 feet become solid black wheels, hard to pick up any spokes detail in black mesh wheels. 5 and 6spoke wheels all have more detail at a distance in black. Mesh wheels in Gunmetal and Titanium have more spoke detail at a distance then black, Gunmetal and titanium work great on 5 spokes also.
Here is a silver car we did we which color matched the bumble bee to the wheels centers. Maybe someone could photoshop the car black for you?
This one runs Boze 9s on the front with 265s on a stock subframe and 315s under mini tubs in the rear.