You can't go wrong with Cane Creeks or American Classic wheels for track.
I've heard various stuff on Mavic's (proprietary lock ring is too soft, too heavy), but I have no personal experience with them. I like my Mavic Equipe road bike wheels, for whatever it's worth.
What kind of track is he going to be running on? If the track is pretty bumpy, the need for tubulars is lesser, as you have to run lower pressures due to bumps.