One other consideration that has not been touched upon is the variance in class sizes between the three schools. WM had 323 1l's entering in 08, St Thomas 151 and Hamline 230. (U of M 230ish)
Also, an experience I had may be somewhat illuminating. When I moved to Minneapolis, I told a woman showing me an apartment that I was attending law school and her reply was "Oh, Mitchell is a great school." In the Twin Cities market, for some reason when people think law school they think Mitchell. The U is obviously a better school,and as of last year Hamline was the "2nd school" in the USNWR rankings (from the briefly published set of rankings that ranked T3's & T4's last year). But to people on the street The U and Mitchell are on a level playing field and Hamline and UST are the "other" schools.
I think the question that the 0L's considering which school to attend need to ask themselves how they are going to distinguish themselves and what school gives them the greatest opportunity to achieve that. B/C in the Twin Cities market, where nearly 100 people graduate top 10% every year, something more is necessary to seperate yourself from the pack.