Just a few questions. Does anyone know how much Hitachi's new plasma 42 pd7200 will be? In layman's terms is hi def about a better quality picture and sound than digital? I own Denon's avc-a1se amp,will i need to change this for hd-dvds? Will these hd-dvds be in dts still,or even dts discrete? I presume i will need a new dvd player which plays hd-dvd?