I think your right about them being all male they all have the same markings and are agressive towards each other. I have posted two better shots in the album.
Also do you have any info on Apistogramma "steel blue"
Thats definately not an A. borellii, but i cant give you a specific species im not so great at ID'ing. If you want you can check out the forums at www.apistogramma.com thats by far the best dwarf cichlid forum and you will be able to get your apisto ID'ed very accurately as there are many knowledgable people there.