Here is a good link to a Gary Merson article where he tests 74 HDTV's and tests a few things, including the ability to convert 24fps to the HDTV's display rate without losing detail.

http://www.hometheatermag.com/hookmeup/1107hook2/

Click on the chart at the bottom of the article for the list and its results. The panny is there, but not the Pioneer you mention.

Good luck.