I also enjoy Aphex Twin (all of the similar bands, like Boards of Canada and Autechre, not as much). I actually wrote one my of first web applications listening to "Selected Ambient Works 85-92". Ratatat is good. Finally, for some reason, I enjoy listening to the Conet Project ( http://www.archive.org/details/ird059 ) while coding.
In general though, I prefer to be in a spot where I don't have to use music to compensate for obnoxious background noise.