Oklahoma should finish #2, or at least that's what I have predicted. The preseason ranking are more of an indication of what they did last year and what they think they have coming back. More emphasis on the former if you ask me. Boise has to overcome a few spots in order to get that #2, and having a Big10 Team in there makes it more difficult considering the conference they play in and the level of competition. That being said, I'd cut em a break and let them prove it from the start. A 12-0 Big12 team would get it in the end anyway, and that's exactly what I think Ou will do this year.
As for now, a mix and match of the top 5 would suffice. Texas is, as always, preseason ranked too high considering what they lost.