I might prefer a touch more crispness, especially in the upper frequencies, as I feel that a touch more upper midrange and treble would be a good thing.
I suggest letting them break in a quite a bit longer. I find the empyrean fairly sensitive to amps and DACs (considerations if your are after more transparent sound). You may want to look at a good solid state amp. That said, I do hear very clear dynamic sound w/ killer good upper mids and treble using my 45 triode based tube amp.