Oz has much better prices.
In the real world, just use your eyes to see, but the difference may not be in the panel but the scalers and video chips within.
For small panels, Samsung and LCD rules but IMO the current best deal is the Panasonic PV 70 42" plasma. Nett 1199, 1999 plus 800 in vouchers from HN or BD.
But if you are willing to wait, the next PC show should have some offers.