Paavoharju - Yhä hämärää 1920x1200 1920x1080

Apparently it is supposed to look pixelated (?).
1920x1200

1920x1080 and a youtube sample after the break.

Balam Acab - Wander/Wonder 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Animal Collective - Fall To Be Kind 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Fall Of Efrafa - Elil 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Artwork from the new Neutral Milk Hotel website.

1920x1200

1920x1080 after the break.

Her Name is Calla - The Quiet Lamb 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Her Name is Calla - The Heritage 1920x1200 1920x1080

I did the best I could on this one. I couldn't find a larger image, and there was no reasonable way to expand it.
1920x1200

1920x1080 and a youtube sample after the break.

Blueneck - The Fallen Host 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

This Will Destroy You - Tunnel Blanket 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Africa Hitech - 93 Million Miles 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Snowing - Fuck Your Emotional Bullshit 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Battles - Mirrored 1920x1200 1920x1080 1440x900

The quality on this isn't exactly ideal, but it's the only large image I could find.
1920x1200

1920x1080, 1440x900 and a youtube sample after the break.

Fripp & Eno - (No Pussyfooting) 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

John Cale - Vintage Violence 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Kyte - Dead Waves 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Little Women - Throat 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

The Beach Boys - Smile 1920x1200 1920x1080

1920x1200

1920x1080 after the break.

Ghost – Opus Eponymous 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Bon Iver - Bon Iver, Bon Iver 1920x1200 1920x1080

Did this with the bit of white border that is on the original cover and without, just pick which you think looks better.
1920x1200 versions

1920x1080 versions and a youtube sample after the break.

The Saddest Landscape - The Sound of the Spectacle 1920x1200 1920x1080 1440x900 1366x768

I couldn't find any larger artwork so the smaller sizes are composed slightly differently.
1920x1200

1920x1080, 1440x900, and 1366x768 plus a youtube sample after the break.

Eisley - Room Noises 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Chad VanGaalen - Infiniheart 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Graveyard - Hisingen Blues 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Set Fire to Flames - Sings Reign Rebuilder 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Andy Stott - Passed Me By 1920x1200 1920x1080

1920x1200

1920x1080 and stream the album after the break.

Blur - Modern Life Is Rubbish 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Otis Redding - Otis Blue 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

The Microphones - The Glow, Pt. 2 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Hüsker Dü - Zen Arcade 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Andrew Bird - The Mysterious Production of Eggs 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Coldplay - A Rush of Blood to the Head 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break. (You need a sample?)

Gnarls Barkley - St. Elsewhere 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

The Shins - Chutes Too Narrow 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

The Zephyrs - When the Sky Comes Down it Comes Down on Your Head 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Four Tet - There Is Love In You 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Long Arm - The Branches 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.

Colin Stetson - New History Warfare Vol. 2: Judges 1920x1200 1920x1080

1920x1200

1920x1080 and a youtube sample after the break.