You're having a good time with your camera so that's a great start. Keep experimenting. I agree that the DNG route gives a slight improvement over the PEF, although this might be different using the full version of Silkypix.

The only thing I would add is that theere is a slight contradiction in your process when you save as a JPEG. You have retained all the information in your file by using RAW capture, but at the very end you compress the file using a "lossy" format. I would suggest the final save should always be the lossless TIFF and you can make smaller JPEG images for web from that as needed.