basically anything from William Orbit's 'Pieces In A Modern Style', or the remixes of any of those tracks (e.g. Ferry Corsten's remix of Orbit's take on Barber's Adagio for Strings)
Unfortunately most of the tracks on the album sound a bit too much like every track he produced for Madonna.
Or if you want to go the other way around, check out the 'Acoustek' compilation (I've only got it in mp3, I don't exactly know where it came from), which is a bunch of famous techno/IDM tracks orchestrated.
01 Orbital 'Forever'
02 Orb 'Little Fluffy Clouds'
03 Sabres of Paradise 'Smokebelch'
04 Brian Eno 'Sparrowfall'
05 Moby 'Hymn'
06 The Shamen 'Re-evolution'
07 Watermelon 'Moonshaker'
08 Plastikman 'Consume'
I'll keep looking. I've got nothing else to do.