For the love of god don't put it downtown, the traffic jam would last until tuesday. The infrastructure can barely handle the daily commute. Build it across the street from the current one. I would prefer a dome but it's not a dealbreaker, the important thing is that they don't cheap out and build it 50 feet underground this time. THAT'S what causes the swirling winds that make it awful to play at. Open air stadiums work fine in cold cities, e.g., Green Bay, Pittsburgh, KC, NE.