Well, I have had some luck with breeding cories, although it was entirely incidental.. but here's my tips..
Give them lots of plants/hiding spaces...
Keep the water relatively shallow (I would say no more than 12")...
Feed the 'parents' reeally well on meaty foods, like frozen bloodworms or brineshrimp..
Then try dropping some icecubes in their tank to 'simulate rain', which helps them feel like it is their natural habitat.
When they do breed, they will lay eggs either on the tank walls ro on plants. As cories and other fish will find the eggss as nice snacks, you will need to be prepared to either collect the egss or move the parents after the eggs are laid. IMHO, it would be easier to move the parents, as the eggs are hard to collect without damaging.
You will need some good airflow througout your tank to avoid the eggs growing fungus... and some good tiny fry food, like psyloplankton.
If I was to choose between the given species for breeding, I would go with peppered, but that is just because it is the one I am most familiar with. Any of them would be fine..
Here's a few decent sites for more tips:
http://www.myfishtank.net/forum/breeding/54354-breeding-cories.html
http://www.fishchannel.com/freshwater-aquariums/fish-breeding/bronze-cory.aspx
Good luck!
