Significant system advantages result if the superconducting levitation and propulsion coils can be operated at temperatures higher than 4.2 K. This can be achieved with cable-in-conduit conductors (CICC) using Nb3Sn and supercritical helium as the working fluid. This paper compares the relative advantages of NbTi and Nb3Sn for this application. It also discusses the system aspects surrounding the selection of operating temperature,current density and number of modules. The features of a suitable CICC NB3Sn conductor which has been manufactured are described.