1. Radiohead - In Rainbows
2. Spoon - Ga Ga Ga Ga Ga
3. Of Montreal - Hissing Fauna, Are You The Destroyer?
4. The National - Boxer
5. LCD Soundsystem - Sound Of Silver
6. Klaxons - Myths Of The Near Future
7. Jamie T - Panic Prevention
8. !!! - Myth Takes
9. Babyshambles - Shotter's Nation
10. The Shins - Wincing The Night Away
11. The Rosebuds - Night Of The Furies
12. Arcade Fire - Neon Bible
13. Bloc Party - A Weekend In The City
14. Maxïmo Park - Our Earthly Pleasures
15. Fujiya & Miyagi - Transparent Things
16. Good Shoes - Think Before You Speak
17. Justice - Cross
18. Kings Of Leon - Because Of The Times
19. Interpol - Our Love To Admire
20. The Good, The Bad & The Queen
Deciding on the order of a lot of these was difficult, as they're all outstanding records. If there's anything on this list that you have yet to check out, you should track them down and have a listen.
There were also a ton of other artists that released great albums this year, including The Cribs, Air, B.R.M.C., Handsome Furs, Feist, New Young Pony Club, Hard-Fi, Modest Mouse, The White Stripes, Simian Mobile Disco, The Maccabees, Caribou, Black Lips, Digitalism, etc. You should take the time to check those out as well.