It must be really cool to have that many of the same species of cory; I didn't have the luxury of being able to keep big tanks anymore since my landlord has a clause in the lease about fish tanks so what I did is mixed sterbai and false bandit corys and they school together just fine so don't be afraid to mix it up just keep at least 6 of a type.
If I could go back to 75g+ I would definitely have around 6-10 of maybe 4 species and mix them as babies; they seem to bond better this way and def. look into Sterbai corys they are just amazing looking if you never saw them in person before; some people will say they are skittish or stick with one species etc but I haven't had that at all they love to come out school and play with their cousins.
Good choice on the panda's I was torn between them and the false bandits at my LFS.
Long time fish keeper most experience with CA/SA cichlids, natives like sunfish, and aggressive catfish.
Currently have a 29g planted with 14 candy cane tetras, 6 sterbai corys, 6 melini corys, a roided out tiger angelfish and 1 mustache wearing albino longfin pleco.
Oh and they all get along amazingly!!! went through 4 BN plecos and 2 angelfish until I got ones with the right temperament but it's the most mellow tank now.