Thanks for the warm welcome
I can't comment on NW's MSP-HNL. We got married in Hawaii this past June and used AA FC reward seats (booked thru US Air w/AMEX miles) for ORD-OGG and HNL-ORD. I was very happy with AA's FC.
As a silver I get upgraded to FC about 95% of the time. This year I've only missed 3 or 4--and one time the CO agent at EWR upgraded his friend over me illegally and got caught (CO gave me a free ticket and free upgrade cert). I only fly ORD as I live west of ORD. MDW too far away.