Need more advise

What would sound richer and warmer, mainly classical and opera and some rock all not at loud volumns listening with my Harbeth 30.1 speakers?
Luxman integrated 20 w class A or Hegel H-300 integrated
Next question
Woo WA 22 Headphone amp (tubes) with Grado GS 1000 i or with
Senn. 800HD.
Or will Luxman Headphone portion of above amp be reasonably
sounding with which headphones ?
Thanks last advise gave me direction. Am I heading in the right direction ?