Washington most likely. Never been to Penn State, though I have made flimsy plans to go before. This might be the year--year 0 of the Campbell remake. Already been to Indiana back when tickets were cheap and you could sit almost anywhere; not sure I want to pay the Cignetti upcharge and have to sit in my actual assigned seat. Never been to Purdue. Maybe this is the year, depending on how the Gophers look.
I am planning to go the Mississippi State in 2027. I have a college roommate who chose to settle there. He's an academic-type, not a football fan, and thinks Starkville has little to offer but for football. Nonetheless, I'll be there killing two birds with one stone. Go Gophers.