Harris would be a great pick up and I would have to think ISU would be the favorite right now since the other two schools aren't very good. Him and Noskowiak would make a great weekend. that to me would be enough to put them top 5 preseason next year.
The only reason I can think of why he'd go elsewhere is playing time. There aren't necessarily a ton of minutes for him, depending on everybody's progression. If we get Diallo somehow than his playing time is really a question mark, IMO.