I think you should be ok. You do need to have an alternate plan for the Nic just in case. The one I have is more on the laid back side, but they are cichlids and individual personality will come into play.
thid id Hriko Bleher and just back from another field trip in the Philippines I just wanted to mention the following: please have a look at my website: http://www.aquapress-bleher.com/index.php?option=com_content&task=view&id=404&Itemid=64
for the Nicaragua biotope aquarium I decorated recently in which most of the cichlids started to spawn right away, you can see it also on the video.