You could give
Fayyette,
Rchetype and
Wolfgun all a shot.
Fayyette is a new musician. Rchetype and Wolfgun have been around for a while, and were actually heavily inspired by the older WipEout games. I often listen to their music when playing WipEout Pulse, especially
Stranger. A shame that the songs outlast the races 70% of the time.
EDIT: Are you using Km/H or m/s for speed readouts? I suggest the latter, as it is the international scientific standard.
And how are you handling the playlist for races; one per level like in Unreal or Sonic Riders, or the whole soundtrack on shuffle like in the WipEout games? What I propose is a cross between the two, where each racetrack has its ownplaylist with the most fitting songs on it.