I respectfully disagree with part of your premise. Heading into the 2006 elections, we could easily flip the votes of Nelson of Nebraska, Robert Byrd of W Virginia, Nelson of Florida, and probably Miss Mary of Louisiana as well.
I would like to see the RATS vote against a black woman in red states with a large black population.
I agree that we might lose a few RINOs, but we could flip some RATS.
The Administration is being lazy.
That doesn't solve your "here and now" predicament that you seem mired down in.
BUT, you see what you're doing, don't you? You are counting on democrats to get a conservative justice passed. Do you really think that if it were Owens, they wouldn't all stand together? Evan Bayh, my senator and a supposed moderate, voted against Roberts. The state is outraged, but he doesn't care; what's important to him is getting a slot on the 08 ticket. I don't think he will vote for anyone Bush nominates.
Really, you are supposing a best-case scenario. That isn't how the Senate works, in my opinion, particularly on a vote such as you envision.