What is arguably the best Coachella lineup (electronica/idm) of them all, here is the schedule from that first year. Some noteworthy conflicts:
Beck v. Underworld
Nightmare on Wax vs. Medeski Martin & Wood vs. Super Furry Animals Vs Derrick May
Kid Koala Vs. Chemical Brothers Vs Richie Hawtin
Push Button Objects Vs. Cibo Matto Vs. Rahzel
Autechre Vs. Thievery Corporation Vs. Scratch Perverts
Coachella Schedule 1999
It goes on and on....