Silver Efex Pro 2. A Nik program for converting to B&W. I use it to create a somewhat high contrast B&W image, then blend it into the color image on luminosity. If you don't have SEP2, you can accomplish the same thing by duplicating your original, using the B&W adjustment layer, adjust the color scrollers where you like, add a Brightness and Contrast layer atop that then blend it all again with luminosity.
Using SEP allows a bit of extra grain to be tossed in if desired.