Just remembered I needed to post this, and I'm specifically going to link to PvD's "Blauer Himmel" Remix. It's (IMO) utter perfection: wonderful vocal, fantastic energy build, lovely acid line. As far as I'm aware it's not available to purchase digitally, which is a shame (I bought a CD copy from Discogs to rip, to complement the vinyl version I bought while back at uni in '96!)
Enjoy!
Enjoy!