So before I carry out my krib breeding plans, are there any more suggestions for cichlids ranging from 2.5-4" that would be fairly easy to breed, but aren't super common (like rams)? Just don't want to commit to something and then find out a few days later that there were cichlids I liked more.
Get a subscription to Cichlidae.com and go through each genus. Every cichlid that's known to exist is listed there. If you find something you like, do some research and see if they're available.