NIT bracketology is, at best, a fuzzy science. There are no Jerry Palms or Joe Lunardis, big name guys with big name sports journalism entities to back up their claims. So take whatever you see here with a pretty large grain of salt.
That being said, there are two sites of good repute that are as close to good NIT Bracketology as we can get. NYCBuckets.com and DRatings.com use different criteria, the former being more full picture-based and the latter being more statistical in nature. These are credible sources of proven record.
NYC Buckets has Northwestern out.