Normally I would not post two versions of the same picture, but this time I could not decide which one I liked the better and after getting affirmative from some others, I decided to post this also.
Here is a link for the colour version: [link]
Thank you. There are so many ways one can make a BW-conversion.
Calculations is one of those, but with this one I have used the channel-mixer.
You could try adding a gradient overlay from black to white and then channel mixer adjustement layer, starting with the constant at -8 and red about 60 and then play around with the sliders to see what you like best.