NOT A LOT TO DO AROUND KLIA in country a bit
DO HAVE FAST TRAIN TO CITY DONT KNOW HOW LONG IT TAKES.
There is a short term hotel in airport which is great value
plenty of shops and pub in terminal
I have travelled malayasian airlines from sydney a few times and find them very good.
http://www.klia.com.my/
http://www.kliaekspres.com/klcat.htm