The more I listen to the Zana Deux SE, the more I feel it is a perfect match for the W3000ANV. I do not need to EQ and I simply can not go back to listening to the W3000ANV straight through my DAC.
The sub-bass feels much more extended on the Zana, whereas it actually seemed like the lowest sub-bass frequencies were missing through Anedio D1's headphone out. The tiniest sibilance that I heard before with the W3000ANV is practically non-existent now, yet treble-detail is almost identical as plugging straight through into the Anedio. I'm really (and I mean really) impressed. I don't care what people say, but I think the Zana+W3000ANV is incredibly versatile. The treble is toned down and bass response increased yet I don't hear the headphone getting more congested or less detailed. I'm still a basshead deep down so sometimes I still like to kick up bass a notch for metal, but I still think it's good for everything I listen to without doing so.
I've been listening after long days of work, however, so my ears may have been a bit desensitized throughout the day. Still, I'm pretty freakin' sure I won't be parting with these two excellent pieces of audio equipment. I think the Zana+W3000ANV is my end game. Maybe I'll try to see what tube rolling can do later on. And to think I thought all tube amps less than $3000 was no good.