4-3 is fine, anything worse knocks them out barring a very deep Big Ten tourney run. As I mentioned before those losses would look really really bad. From here on out they are either playing other bubble teams or just flat out horrible teams. If you assumed 4 losses that weren't Nebraska or NW you are assuming they lose 4/5 of: Purdue, Rutgers, Michigan, Minnesota, and Indiana. Considering this would give them double losses against 3 other bubble teams you really are not doing yourself any favors. Hard to be put in over a team when they beat you twice. I think I would bet on them going 5-2 over 3-4 though.