Thanks both, for your input!
I did a lot of research before buying this headphones, and from all reviews/comments, I believe this headphones should have the sound that I like.
It's good to hear that breaking it in would help and I will also try swapping pads. Now I have Verite Perf Pads, Universe Lambskin Perf, and BE2 Hybrid Suede/Leather pads (currently installed).
About my amp, it's V281 (not a tube amp), and based on my research, this amp should have more then enough power to drive the VO, and from many people's comments, it also has good synergy with the VO.
I also have a very good/custom made 300B based tube amp but have yet to try it with the VO (have no desk space left).
IMHO the V281 is about as good a SS match as you'll ever find for any of the ZMFs. At one time or other I've tried them all of the current models on it & currently own 3 (silkwood VO; blackwood Aeolus; ormosia henryi Ori).