MS, on the hiding places, they'll hide in groups. I have a slate ledge that my bandits like to hang out under, and I'll sometimes see as many as five of them lined up like parked VW beetles under there.
An aesthetic consideration, if these are for the new tank you put up pix of. My 55 with all the cories in it has black gravel. The Albinos show up really well, and the Bandits too, but the Sterbas tend to fade into the substrate. They're quite pretty and cool and everything, but they display best over a lighter background. If you really want a reticulated cory, then C. trileatus, julii, leopardus, aggassazii, or any number of others that have a lighter background color might serve better.