Arizona pretty much took over the game after I mentioned it was back to even. Houston could get back within a few points, but just could never quite gain the upper hand.
Then there's the Mich - Duke game. Duke looks good, and Boozer is crazy good. Michigan didn't look very sharp throughout the later part of the second half, even though they would get close, but like Houston, just made a few too many mistakes.
However, I'd say these four are going to be a challenge for anyone in the tournament. This is a year of parity and great competition. I'm sure there will be some bracket busters (or I hope so, anyhow) to mix things up.