Dream Theater - falling into infinity, Awake, Images and words.
Yngwie Malmsteen - Magnum opus
Pink Floyd - The division bell
At The Gates - Slaughter of The Soul
Vaya Condios - The best of
Crasch test dummies - God shuffled his feet
Dire straits - Money for nothing
Loreena McKennitt - A winter garden, the book of secrets
Sarah Brightman - Timeless
Whitesnake - Starkers in tokyo
Arjen anthony lucassen's - Star one
The 595 is absolutely best with progressive metall, Magnum opus and Yngwies guitar solos is just amazing on them.
Anberlin - Cities (specifically the song "The Unwinding Cable Car". Some of the finest acoustic i've heard)
Franz Ferdinand - Franz Ferdinand ("Take Me Out" is a great song)
Michael Jackson - Thriller
The Slip - Eisenhower
The Fold - This Too Shall Pass
Saosin - Translating the Name
I'm drawing a blank... there are lots more. Most of that is indie stuff that I am sure no one as even heard of...
King Crimson - Lark's Tongues in the Aspic Part I
Ionization (not sure who is the composer, classical percussion piece)
Samuel Barber - Dance of Vengeance
Shpongle - Once Upon the Sea of Blissful Awareness (female vocals + excellent ambience with loose rhythm, enchanting)
Thats just a warm-up I can keep on going and list half of my playlist, I love music =]
A lesser known indie band that sounds great on good headphones is Califone. All of their albums are available on emusic, and all of their stuff gets great reviews by publications like Pitchfork. I can't recommend them enough. Sort of like a cross between old-time folk and blues and modern rock and electronica.
Also, I recommended this on a different thread, but if you haven't heard Broken Social Scene's self-titled album (which came out a couple years ago), you will be blown away. I guess it would be categorized as alternative rock, but there's elements of electronic music, and even some strings and horns on a few songs. I don't know how many members there are in that band, but I believe it's more than 10, and the music is just incredibly rich and complex. There's also multiple vocalists, some male, some female, and even a rapper on one track. And almost every song is full of beautiful sonic details.
Unusual CD I got recently, Archipelago, a trio of bassoon, accordion, and percussion. Some tracks have amazing bass. I never knew an accordion could play so low. Can really rattle my ears even at low volume.
Daydream Nation - Sonic Youth
Disintegration - The Cure
Nightsongs - Stars
EBTG - EBTG
Rust in Peace - Megadeth
Aluminum Tunes - Stereolab
Repeater - Fugazi
Every Time A Bell Rings an Angel Gets His Wings- Logh
Under a Pipal Tree - Mono
Nowhere - Ride
Miss Pizzicato Five Superstar in Action (DVD) - Pizzicato Five