Thank you.

Yes pillows will help. Thank you for your suggestion. 

Thanks you for your reply. There is like $2 difference on the flights. However, I have read online if I were to choose the seat while booking the flights with Qantas, it's an extra $25. Not sure if thats per booking or per flight. Not sure about Cathay. 

Thanks for the tip. 

Hi there. I am planning to take a flight from MEL to HK later this year. We will be taking economy class as the others are out of our price range. Which airline as a more comfortable seat as I have a lower back problem? Thank you for your suggestions.