^^^ Sweet DSG!! I know I'm excited, and glad to see someone will share that excitement with me! The LCD-3's are fantastic. They are particular about amps though. When I got mine I was running a BiFrost/Lyr combo and I was like "OK where's the beef?". Then I got the Stratus and I heard what the fuss was all about.
I think this is it really: The LCD-3s with serious kit are highly detailed, yet impactful. The TH-900s are more "fun" with a big bass kick but don't have the micro-detail. There is a lot of music I have more in the direction of modern and pop that sounds a bit bland out of the LCD-3s that the TH-900s made more enjoyable (as would the TH-600s or Ultrasone Sig DJs for similar reasons). Likewise my best recordings where you can hear how the players' clothes shift as they move and other uncanny stuff is better with the LCD-3s.