New Chief Justice on Supreme Court

Chief Justice William H. Rehnquist died Saturday, leaving Bush the rare opportunity to appoint 2 supreme court justices. Bush having already nominated John Roberts for the court, has now nominated him for the newly vacated "chief justice" position. I don't know the history of the supreme court selection process, nor do I care. I only want to ask the question, is this right? Is it fair? Is it correct? I mean shouldn't one consider those already on the supreme court to fill the slot of "chief", then replace the lesser positions with new people? I mean don't you think the "big cheese" ought to be "well aged" for the gouda of the country? Sorry had to put that in, couldn't help it.