Idk, I guess I dont view things like that. I respect NW and the disciplined style of football they play there. They make due with much lower recruiting classes than most of the B1G, yet compete nearly year in and year out. When they lose, its often by very little to powerhouses.
Plus, the fact that they're one of the very original B1G teams ever, could actually help lend some credence to legitimize NU place in the conference.
I will say though, Iowa is much more the natural rival, being border states and all. We'll see if(when!) we start beating them in order to spawn even more competition between the two. Iowa owning us the past few years makes for very little of a rivalry unfortunately. Even though we're historically the more dominant team and recognized brand, Iowa has been stout most of the years NU's been struggling. Iowa looks to Wisconsin to make a rival, because you set your aims high to beat the top dog to become it. We did just that with Oklahoma, and Colorado did that with us. If we can get good again, put Iowa down a few games in the series, them maybe we can see the juices of a rivalry begin to flow (beyond mere fans talking crap to each other at work and whatnot).