First off, congrats to you Nathan! Get ready for a few sleepless nights, the first couple home are the challenge, but the most exciting!
Swami- I would go with Abbott Northwestern in Minneapolis. Technically, I don't believe there's a maternity unit at Children's (at least there wasn't when my young pucksters were born in '03 and '06) but Abbott is directly next door and is affiliated. We had great experiences there and had several friends who are MD's (in outside systems too) tell us the Abbott was the best in MSP. The only drawback is that it can be a haul from the middle to outer ring suburbs, but we live south of the river and still made the drive, went door to door in 23 minutes for our first.