I would really like to get a hold of one of Juno Reactor's albums. Bible of Dreams seems to be popular. They did a lot of the music for The Matrix and anything else of their's that I've heard I've loved.
One of my all-time favourite groups is Dune, but only their earlier stuff. Their later stuff is commercial crap. They do happy hardcore. Try one of their albums: Dune or Expedition. Their music is quite specialist, though. You need to like rave music to enjoy it.
