Tutti Bambini has gorgeous and ergonomic nursing chairs. I remember wandering into one of their stores in London with some friends and being amazed. I love that some of the nursing chairs come with ottomans so you can prop your feet up if needed. Not too sure if they're available in Singapore, did a search but can't seem to find any. It is available on Amazon.com though.
I use the IKEA poang rocking chair. It's ok ok for nursing - a little too deep, so you definitely need to use a couple of pillows. But awesome for cuddling baby Do get a foot stool to go along with it.
I use the gliding chair from mother care. I highly recommend it.
thanks