It's a pretty fish. You can do an all male peacock tank if you have a large enough tank and you're very careful about what you put together. That said, "jakes" tend to be on the nastier side of the peacock world and sometimes can be difficult to manage. You could trade him to someone with a big all male tank and get a male of certain lineage and then get females from Dave and pick them up at Aquamania.
With not all that many people in CCA doing Old World these days (what is WRONG with you people??!!) breeding common peacocks is probably not very useful unless you have lots of tanks to keep the fry in or are willing to ship. If you want to do it, get the harder to breed i.e. less common peacocks and try your hand at a colony of those.