  We briefly summarize two related calculations. First, we demonstrate that the
instabilities (either nesting or pairing) associated with the high-T_c cuprates
can be described by an SO(6) transformation group. There are two independent
6-dimensional representations (`superspins'). One superspin combines Zhang's
5-component superspin with a flux phase instability; the other involves a
charge density wave, s-wave superconductivity, and an exotic spin current.
  The second calculation is a self-consistent slave boson calculation, which
provides a good description of the doping dependence of the photoemission
dispersion in terms of dynamic striped phases. The stripes are stabilized by
strong electron-phonon coupling, and provide evidence for a doping-dependent
crossover between the two superspin groundstates.
