Has anyone seen the Panasonic PT-52DL52( 52" dlp rear proj)? I just got a flyer from ONECALL and they estimate a Dec 20 arrival. Will sell it for $4499 but I hven't seen anything but the Sammy hlm507. On paper it looks suhweet! Panasonic website only shows the pt-52dl10 at $12,999. What's the difference?