  Next-generation long-baseline electron neutrino appearance experiments will
seek to discover CP violation, determine the mass hierarchy and resolve the
$\theta_{23}$ octant. In light of the recent precision measurements of
$\theta_{13}$, we consider the sensitivity of these measurements in a study to
determine the optimal baseline, including practical considerations regarding
beam and detector performance. We conclude that a detector at a baseline of at
least 1000 km in a wide-band muon neutrino beam is the optimal configuration.
