Roberts is not a Souter clone. Souter was not well known at all, but Roberts is. Roberts is the president's nominee and the president is NOT going to ditch him and pick someone else.
Just get over it.
And just remember, there is NO guarantee, no matter WHO is picked, that that person isn't going to change, once on the bench. Even Robert Bork has said things which some Conservatives have found fault with, lately.
Roberts isn't a 'movement conservative'. If you subtract the typical .003 crowd that seeks any stepping stone to destroy this President, this is the main issue those with concerns have as it would reassure he was on 'their' side if he were.
People are correct when they state he is not Scalia in a sense. He is not a movement conservative.
What he is, from writings I've read, is a person dedicated to preserving the three branches and interpretating the Constitution. This is the sense the President promised when noting Scalia and Thomas in his campaign promises. He did not promise a conservative that would give fiery speeches blasting liberalism.
I'm content in the nomination, I've yet to see anything that would alter my position.
You are also correct in that no Justice would ever be good enough for everyone. Luttig would have had his critics. Scalia has critics. A few weeks before the President made his selection Luttig was being blasted for a ruling against the administration in the WOT, now Coulter cites him as the person the administration should have chosen. A few months ago Scalia was being ridivuled for the marijuana case, now conservatives think him without blemish when it serves purpose to tear Roberts down. Conservatives cannot have it both ways.