FWIW, I've tried the Valhalla with the Rowland 10 using WP6 speakers, and I did find the sound too lean, bordering on bright. Source was the Audiomeca Enkianthus DAC.
However, I love the Valhalla with Levinson (same source and speakers), which is darker sounding than the Rowland. So indeed, synergy (as well as personal taste) is very important.
However, I love the Valhalla with Levinson (same source and speakers), which is darker sounding than the Rowland. So indeed, synergy (as well as personal taste) is very important.