My quandary

Its a little while since I added to this blog, but quite honestly I have been arguing with myself about Indonesia. If we go all the way down Asia and to Singapore, then there is a very real chance that I am going to miss out seeing the Orangutans in their natural habitat. On the other hand, if we go see them in the north of Sumatra are we then going to get down Sumatra very easily to Jakarta and will we miss out on Kuala Lumpur and Singapore? Besides which, where to fly from to get to Australia and where in Australia will we fly to. The plan eventually is to get to Perth and stay a few weeks for a rest.