In case it is of use to anyone: I just bought a TV (although it's smaller than what OP is looking for) : the LG 32LF580V
, currently on sale at M-Electronics for 349 chuffs. I had a 10% off voucher so it was even cheaper.
It met all my requirements: 1080p panel resolution, built-in wifi, USB recording and Netflix support.
I've only had the time to unbox it and set it up, but so far it looks good.