There have been many good suggestions so far. In addition, I would experiment with the filter options on the Vega. When I owned one years ago, they definitely could impact the sound. This will not make huge changes, but it's free.
You might benefit from a EQ in the system to take down the top end of the Krix by 2-5 dB when you are playing rock. In looking at the graphs in Australian hi-fi, the response, though smoother and flatter than most, does rise by a few dB between 1 kHz and 10 kHz. This definitely could manifest as sounding "harsh" on many current recordings.