  We estimate the Diffuse Supernova Neutrino Background (DSNB) using the
simulation results for neutron star-forming and black hole-forming stellar
collapses from the Garching group. Scenarios with different distributions of
black-hole forming collapses with the progenitor mass are discussed, and the
uncertainty on the cosmological rate of collapses is included. The electron
antineutrino component of the DSNB above 11 MeV of energy is found to be ~(1.4
- 3.7) cm^-2 s^-1; the contribution of black hole-forming collapses could
dominate the flux above ~25 MeV. We calculate the potential of detecting the
DSNB at SuperK-Gd and JUNO, in about a decade-long period of operation. We find
that, in our model, it is likely that a significant excess above the background
will be obtained at JUNO, while detection will be more difficult at SuperK-Gd.
The potential when the two experimental results are examined jointly is
discussed as well. We also consider an example of a future O(10) kt slow liquid
scintillator detector, and show that there the odds of detection are very good.
Our results motivate experimental efforts in reducing the backgrounds due to
neutral current scattering of atmospheric neutrinos in SuperK-Gd.
