To me there's no clear #1 right now. I see a group of 6 teams (seven if I add a rising Kentucky) that have a shot at winning it all and then there's the rest. I don't see anyone outside of Duke, Virginia, Tennessee, Michigan, Michigan State, Gonzaga and possibly Kentucky winning it this year.
I wasn't crazy about Kansas before they lost Azubuike, but now forget it. Nevada, Texas Tech, Virginia Tech, North Carolina, Maryland, Marquette, Houston, Buffalo, Villianova and a few others are all very good but not complete enough to win 6 in the dance.