I am currently trying to work out my trip to Madagascar and will do following routing:
Tana - Antsirabe - Morondava - Bekopaka (Tsingy de Bemaraha) - Kirindi - Morondava - Antsirabe - Tana.
After that, I'll go to Nosy Be for some diving. Now I can't decide whether or not to add Andasibe before
flying to Nosy Be, and have less time for diving, or skip it and go diving! While I do enjoy wildlife, I don't
have a list of "must see" animals, so "only" for the Indri Indri I wouldn't have to go. Vakona private
reserve would be on the program as well. Any thoughts??? Thanks very much!!

Well, I'm a totally animallover and found the Indri Indri amazing when they all started to sing in the morning - but if that's not your intereste then I don't think you should go. You will se other lemurs, cameleons, insects etc. in the other parks as well.
We made a small video of the indri. If you want to hear the sound of it you are wellcome to have a look:
http://www.annemarieograsmus.blogspot.dk/2013/07/indriernes-sang.html
Have a great trip - Madagascar is a great place!
Anne Marie