I’ve heard from quite a few good photographers that the Nik collection is a good set of tools to add to your software arsenal, in particular silver efex pro. I always found them a tad on the expensive sign. Seems that has recently changed with Google taking over and now the full suite is available for 150 USD. I downloaded a trial today to play around with Silver Efex pro 2. I ended using the noise reduction and sharpener tool on this photo too. For a first try with the tool, I’m quite impressed.