Mate you should be able to get a Bravia 40" LCD from JB for about 2 grand now... I got mine for about $2,300 earlier this year so they should have come down in price since then... Go Samsung or Sony for LCD, don't bother with yum cha brands IMHO
In fact Harvey Norman have good deals too... my brother in law just got a 46" (bastard had to go bigger than me hehe) for a steal, almost the same price I paid for mine
I wouldn't buy a tv off the net, too hard to get it fixed/replaced if its faulty