This is the cage I have my two breeder conures in.
[ame="http://www.amazon.com/Prevue-Pet-Products-F070-Hampton/dp/B00EQ28WX0/ref=pd_sbs_199_20?ie=UTF8&dpID=51nu7bSAA5L&dpSrc=sims&preST=_AC_UL160_SR157%2C160_&refRID=1TRXGZ6G4N727K4G8D4J"]http://www.amazon.com/Prevue-Pet-Products-F070-Hampton/dp/B00EQ28WX0/ref=pd_sbs_199_20?ie=UTF8&dpID=51nu7bSAA5L&dpSrc=sims&preST=_AC_UL160_SR157%2C160_&refRID=1TRXGZ6G4N727K4G8D4J[/ame]
No divider in, and I had gotten a second to put on top for my cockatiel. The sides both have doors made for breeder boxes, though mine is off for a little bit while they'e getting used to the cage. I'm also going to be getting a bigger breeder box that's L-shaped instead of the plain square one they have now.
The biggest thing for me is not only the size of the cage for the caiques, but the lack of a grate on the bottom. If you're intending for them to breed (which could take a while) you don't want to take the risk of them carrying icky stuff up into the nestbox with them.