Don Imus is much better than Katie Couric, Matt Lauer, Diane Sawyer, Charles Gibson, Ted Koppel, Peter Jennings, etc.
However, if I had to "nominate" a media personality to an important position, I'd go with Brit Hume because he has a long and proven conservative track record of covering stories that most liberal media types never want to touch. I'd be comfortable with Brit Hume. I'd know who I was getting. I wish I could say the same about Roberts, although I'm optimistic that he's at least as conservative as the justice he'll be replacing.
I really doubt that Roberts, the SCOTUS nominee, will make his first media appearance on the I-man's show. It makes NO sense whatsoever! :-)
Roberts is more Conservative than O'Connor; that you can take to the bank.