Byrnie
Headphoneus Supremus
So I went back to the dealer who has LCD-XC and took a heavy-hitter source chain with me this time, and spent an hour there. (And this time there wasn't a crazy European guy in the back room demoing $50k speakers at 110db with big-band music...) I was able to identify areas where the LCD-XC was clearly superior... impact, staging, attack... the 1540s are extremely unveiled cans, but the XCs are that much more transparent, in the "tickle your eardrums" kind of way. But I'd still put the 1540s at a solid 85% of the LCD-XCs at almost 1/4th the cost... and that's with a source chain that costs more than the XCs. Something to consider if you can afford the absolute best, but for under $1k the 1540s and I'd say the Alpha Dogs cannot be beat for closed.
You should add a signature or update your profile with what gear you have. I believe you are refering to your m920? Oh btw I checked out the m920 at an audio show last weekend. What a terrific amp/DAC! If I didn't already own the Bifrost Uber I would probably have the m920 on my list for a future amp. My only problem with Audeze cans is I can't get over that they cost 1k+ and they're so uncomfortable and heavy compared to others cans I own. Now the HE560s are another story (light and comfortable).