In Australia any cheap lcd will be the way to go then. You're not going to fiund anything that is all that impressive though in that price range (unless you can find a cheap Samsung plasma which we didn't really ever get from what I have seen).
I wouldn't worry about 'blue-light'. Just make sure whatever tv you get has a sleep mode (soi it turns itself off automatically after a set period of time and that it has a 3.5mm jack (I would also recommend going with a brand name tv and not something like palsonic).
I haven't seen this tv myself but it seems like a good fit for you.
http://www.harveynorman.com.au/lg-32...hd-led-tv.html