I've always used AP votes and will continue to so I'm sure you won't
Using Sagarin to look at SOS of a completed season is not comparable to using Sagarin to rank teams who haven't played yet
If you go by AP, you can't use Sagarin SOS. This is how bad Sagarin was last year.
Sagarin Texas #15, AP #25
Sagarin KState #26, AP #38 (the way you calculate it)
Sagarin OSU #22, AP didn't even get a vote for top 25, so below #40
Sagarin ISU #28, AP didn't even get a vote for top 25, so below #40.
Sagarin so overrated all the Big12 teams, of course the SOS was totally inaccurate, and way out of line with every other SOS metric. Just 4 Big12 teams alone he overrated them by at least 52 ratings spots.