I have been really enjoying using Macphun's Tonality software as a replacement to Nik Silver Efx Pro 2. I find the controls simpler to use, the workflow is more powerful with full 16 bit processing rather than the 8 bit in Nik and the results are stunning.
I process my photographs to as near as possible in Lightroom, starting with my presets then tweaking them. Then I transfer the image into Tonality for adaptive exposure, smart contrast, clarity, structure and micro structure enhancements before returning to Lightroom for the final toning. The results are stunning.
Actually the whole suite of software looks interesting.