I'm personally not too crazy about this pairing. I hear transparency and clarity with a wide soundstage but kind of cold. The highs are over prominent, even fatiguing to me. Bass is rather weak as well. I actually find the pairing with the X3 much better. Smaller, more intimate sound stage but warmer, with more body to the sound. But remember this is only my opinion. I believe someone else earlier in this thread expressed a liking of this pairing.
In case it makes a difference, I use the K3003's with the reference filter.