Has anyone seen any of Sony's new 16x9 TVs? Particularly the KP51HW40 and the KP57 HW40. These sets seem to have all the goodies generic to the new HS20/30 and seem to be the same as the more expensive XBR 16x9 sets but without the built-in HDTV tuner. Also how well do Sony's sets display a 4x3 picture on these widescreens and what are the options (ie: zoom , stretch, etc)? Any comments?