Barthezz - On The Move

'On The Move' is of the definite anthems of 2001. The groundbreak and freshness of this track is not in a new kind of sound or technique, rather the detailed crafting, finetuning and perfection of every millisecond and every channel in a non-usual manner - done in a very smart way that avoids crammed sound and still leaves plenty of 'air' to leave the track easy to follow. (This gives a rather hard task for remixers, as it is hard to be creative on a track that contains everything...) Also one of the best examples on how to use the arpeggio the right way.
The follow up, 'Infected' took everything that 'On The Move' was about, one step further.

These two tracks are quite different in mood from those Bart made later on but the extreme attention paid to detail remains. It is no wonder that many producers drew inspiration from them and also left a perceptible impact on UK hardcore (which already started to become more and more trancey).
Also a thing to notice that the radio edits are also perfect - not getting lost either in breakdowns or in beat parts (such as many radio edits of trance tracks), finding the balance between the two.