I think you need to play around with the tones a bit to get some more detail in the sky and maybe a little lift to the midtones in the foreground - nice landscape.Very nice black and white Roy.
Another black and white - view of a river (pano click to see full size)
I did two separate tweaks, first using a graduated mask to just leave the sky which I darkened by about 5% overall and then darkened the shadows and mid tones and lifted the highlights. I then reversed the mask so that just the foreground was showing and darkened the shadows and lifted the midtones. I also gave it a warm tone using a platinum toning filter, but that was just messing around. Same would apply to straight b&w.