I'd like to hear out your choices and most importantly - your motivation for the choices. Below are mine.
1. John Mayer - Heavier Things. (just speechless about his music. Since I first heard it about 5-6 years ago I almost never skipped a song by him in my randomly arranged playlists).
2. Coldplay - X&Y. (kind of mainstream, but these guys deserve every good word people say about their music. Beautiful and surreal stuff).
3. Jamie Cullum - Twentysomething. (this person has such an amazing quality of mixing jazz and pop into an incredible relaxing music. Just listen to his version of Singing In The Rain).
4.Sigur Rós - (). (Only in Iceland could such a beauty be created. The unique sound and atmosphere brought by this band just blows my mind and makes me feel in a different world for a while).