I'm not really a big CD3000 fan, but these aren't your average CD3000.
These badboys have BASS! They still have the detail of the stock CD3K, but they're not as treble heavy. I like them better than the DT990 600ohm I used to own, and the bass is better too. Alex's V2 cables, yumm.
Unfortunately my amp and DAC are being tweaked by luvdunhill, so I haven't had the chance to hear them in my main rig yet, but my preamp balanced outputs are driving them just fine for now.