Good b/w can be surprisingly hard to do with Photoshop. A plug-in can help
(CLICK FOR FULL-RES)
Silver Efex Pro starts you off with a neutral conversion—you’ll notice that all of the adjustment sliders on the right side of the screen are set at zero. From here, you can select one of the presets on the left as a starting point (each one is adjustable) or evaluate your image and begin adjusting manually. If you don’t like any of the presets that you try, click the first one, Neutral, to get back to the default conversion.