  The ``optical bars''/``optical lever'' topologies of gravitational-wave
antennae allow to obtain sensitivity better that the Standard Quantum Limit
while keeping the optical pumping energy in the antenna relatively low. Element
of the crucial importance in these schemes is the local meter which monitors
the local test mirror position. Using cross-correlation of this meter
back-action noise and its measurement noise it is possible to further decrease
the optical pumping energy. In this case the pumping energy minimal value will
be limited by the internal losses in the antenna only. Estimates show that for
values of parameters available for contemporary and planned gravitational-wave
antennae, sensitivity about one order of magnitude better than the Standard
Quantum Limit can be obtained using the pumping energy about one order of
magnitude smaller energy than is required in the traditional topology in order
to obtain the the Standard Quantum Limit level of sensitivity.
