Ideal time for further film evaluation of top prospects

The regular season has been over for two weeks and there aren't many games to break down at this time of year. So, this is actually an ideal time to break down players on film -- from 2007 as well as past seasons -- and the changes you see on this week's top 25 Big Board reflect film evaluation. And you can expect even bigger changes to the board once underclassmen declare for the 2008 NFL draft.