I just sold my Diamond X3's this weekend. Took all of 30 minutes with several buyers immediately. I had both the X3 Diamonds & the X3 Lapis (which I am still selling). I found them to have the same basic sonic signature - very very detailed & quick. I think for tubed electronics or with electrostatics they are a great match. I preferred my 'special edition' quattro-fil cables to the diamonds but I think I'm oriented towards the nordost sound.