From what I have read I think I'd probably still like my LCD3's over the X, but there are two clear advantages about the LCDX & XC that I really wish I had... Metal Housing and efficiency... I really don't like the wood. I think it makes my headphones vulnerable to humidity/temp changes and physical damage. Then the idea I could power it w/ just my iphone really changes the way I think about using ortho's.
All this makes me want to buy a LCDXC, but then its too hard to rationalize owning 3 headphones instead of a SR009.