I would expect Purdue may have #1 votes, but I'd be shocked if they remained at the top. They may only slip to #2, but Houston will be #1 come Monday I expect - that's just based on what the voters usually do.
With Virginia, Kansas State, and Kansas State all losing this week, I think the top 5 teams will be the same but the order will change as Tennessee also lost this week...just guessing here (and probably not a lot of separation in total points):
Houston
Alabama
Purdue
Arizona
Tennessee
Long way to go, and the Boilers are in really good shape in the conference and NCAA-tournament resume wise. Still, they have work to do and need to finish strong:
Iowa
@ Northwestern
@ Maryland (unbeaten in conference at home this year)
Ohio State
Indiana
@ Wisconsin
Illinois