If you like the less heavy shoegaze/dreampop genre, check out Mazzy Star
The record "Tonight that I might see" is amazing listening on my HD598's or for more bass HD650.
The song "Mary of Silence" is also wicked haunting.
Shoegaze is one of my favorite sub-genres--some bands to check out for anyone who is interested:
Boris, Deerhunter, Have a Nice Life, Jesu, M83, My Bloody Valentine, Ride, Slowdive, Smashing Pumpkins, Spiritualized, The War on Drugs, and Yo La Tengo. Shoegaze has also been seeping into black metal in a pretty big way in recent years--if you're feeling adventurous, three bands to check out would be Agalloch, Deafheaven, and Wolves in the Throne Room. My HD650s treated shoegaze pretty well--I'll let you know how some of my favorites play with the LCD-X. ^^
Curve is another band that ought to be mentioned here.
On rateyourmusic.com the user shockofDAYLIGHT is the resident shoegaze expert, and he published this list of his choice of 50+ best shoegaze/dream pop albums, plus also-rans and EP's.
He knows his stuff when it comes to this genre, so none of his picks are bad.
Buried towards the end of his list was one quasi-shoegaze band, Kitchens of Distinction, that merits consideration. A contemporary of other early 90s shoegaze acts like Lush, Chapterhouse, and Slowdive, Kitchens has more forward (clearly discernible) vocals but the massive and lush guitars that defined the style at that time are some of my favorites. Their second album, Strange Free World, features some heartbreakingly beautiful melodies.
Before purchasing some Alpha Dogs, I tested some LCD3s with Kitchens' "Drive That Fast" from Strange Free World. Absolutely beautiful--a very deep and 3-d soundstage. The AD's come very close to the LCD3s to my ears on a lot of classic shoegaze. I was a bit concerned that a closed phone couldn't deliver the depth and imaging, but have been pleasantly surprised by how the AD's handle this genre.
A few recommendations, more or less crossovers from shoegaze/post rock/dream pop.. Some IMO very overlooked bands like Ultra Cindy, 14 Iced Bears, Swirlies, Swirl, Revolver, Mojave 3, Pale Saints, The Field Mouse, The Belltower and The Pastels. All worth looking into.. + Telstar Ponies..
One word: Jesu. Even got the "Duchess/Veiled" vinyl EP of theirs (it was sold out in two hours or so).
My (very heavily modded) ATH-M40 work fine off pretty much any amp with that (also Godflesh and pretty much anything else related, like Final and Solaris BC). Now of course they're extra-dampened, and recabled with SPC wire with a heavy copper braid shielding. So they really are closer to the higher-end sets like HD650 and K-701 (the resolution is mighty fine, they've been used for sample cleanup and show dirt monitor speakers and other headphones miss). Modded ATH-M40 are similar to Genelec monitor speakers in the studio, they just show what's there with little bias towards bass or treble or whatnot. As a matter of fact, what one gets out of a guitar amp's headphone/line out with them is much the same as what the guitar cab plays.