This list is sure to see changes over time, depending on new songs or albums, but you can't go wrong with the following artists, who represent a good share of what I listen to. For real time statistics on what music I take in, try Music Mobs or Last.FM, both great services.
1. DJ Tiesto
2. DJ Armin van Buuren
3. Underworld
4. ATB
5. DJ Irish
6. Depeche Mode
7. Blank & Jones
8. 4 Strings
9. Paul Van Dyk
10. Stereolab
