Calm, Cool, & Collected

When I think of cool, mellow bands that have a great beat, but are not noisy and obnoxious, I think of the following artists:

1. St. Germain
2. Thievery Corporation
3. Gotan Project
4. Fila Brazillia
   

Technically, this genre is referred to as Ambient or Electronica, but I think it should just be called "cool beats".

If you like cool, but want something more exotic, try the band Pacifika (their latest album is Asunción).