As for the rankings, I'd assume the teams looking to possibly drop out of the Top 25 are Washington (definitely), UNC (likely), FSU (possibly) and Michigan. Michigan is possibly based on an uninspiring win against likely bad team, and the fact that the team they beat to get in the top 25 is looking mediocre at best. Plus there are a lot of teams out there that can make a claim to the top 25 (Georgia Tech, South Florida, Oregon, Iowa, South Carolina). I am gonna guess Washington, UNC and FSU are out, while Iowa, South Florida, and South Carolina make it in. If one of those teams didn't get in, Oregon probably looks next most likely.