  We compare the sensitivity of WIMP detection via direct separation of
possible signal vs. background to WIMP detection via detection of an annual
modulation, in which signal and background cannot be separated on an
event-by-event basis. In order to determine how the constraints from the two
different types of experiments might be combined an adequate incorporation of
uncertainties due to galactic halo models must be made. This issue is
particularly timely in light of recent direct detection limits from Edelweiss
and CDMS, which we now demonstrate cannot be made consistent with a recent
claimed DAMA annual modulation observation, even by including halo
uncertainties. On the other hand, we demonstrate that a combination of these
two techniques, in the event of any positive direct detection signal, could
ultimately allow significant constraints on anisotropic halo models even
without directional sensitivity in these detectors.
