Went to singapore with TIGER ex Darwin a while back.
Although it is a LCC you get exactly what you pay for.
On time, friendly staff, pay if you want food or drink but under $400 return.
Wouldn't consider Jetstar, used to use QF but its all about choice now and QF isn't an available choice anymore.
Go TIGER I really hope they do well over the same routes )or should that be roots) as jetstar.