A good place to look is over at
www.dtvforum.info. They have a wiki running there with all the latest prices people have been able to get. At the moment there are a spate of new models hitting the market between now and September. In the plasma market Panasonic has its new 8 series hitting stores. I've seen the new 50" 800 model advertised on DickSmith for $3500 which tells me that in a few weeks it should be had for closer to $3000. You can get the Pana 50" 80 series (1366x768) for $1900 which is an awesome price.