I'm a sucker for melodic electropop with some vocals. There might have already been a topic about them here, not sure
I loved their collaboration with Peter Heppner on Dream of You and I Feel You. And recently I heard their song with Nadia Ali (from dance band IIO), and also loved it. Good stuff...
Schiller feat Nadia Ali - Try
http://www.youtube.com/watch?v=7nINBj9YF5c