Well, as I have said before I believe there is a slight difference of priority between what I would call the old republican "power politicians" like Cheney and Rumsfeld and the intellectual neo-cons on the other.  Cheney and Rumsfeld are in it primarily for the power and money and basically belong to the Reagan school of the Republican Party, while there is something more to the intellectuals.  They are of a newer school in the Republican Party and more of a messianic/ideological group believing in a higher purpose of policy.  Kristol, Pearl and Wolfowitz are, in my opinion, more in it because they see a possibility of creating a so called "New Era" and a new "World Order" dominated and lead by the US alone.  The US uniqness in being the sole Superpower is to them a new dawn so to speak for America.  The power vacuum that was created by the disintegration of the Soviet Union and the ending of the Cold War had to be filled and the country destined for that role was the US, thus the PNAC think tank.  And the only real edge the US had over other rivals was their military strength and that is why it was vital to renew and reform it.  They had to actively push for a more dominant foreign policy spearheaded by military force and keep it that way in order to be in control and keep the edge over the other rivals on the international arena, if not, the US would soon loose their unique and dominant position in the world and the America could no longer control their destiny alone by forceful policies back up by their military power.  The military-industrial complex is just a means to an end for the neo-cons while Cheney and Rumsfeld, as old defence politicians, more identify with it.  The saw a commonality with the neo-con group in promoting the military as a foreign policy tool and thus found each other, primarily during the Reagan period, even though the neo-con intellectuals had nurtured close relation with military industrialists politicians like Scoop Jackson long before they got into behind the scenes positions in the Reagan administration.  

Both did see after a while that the policies of the Bush administration was still to much dominated by the the old real/power politicians Cheney and Rumsfeld and began to distance themselves from an taking an active part in the day-to-day policy implementations of the administration an the now the intellectuals are distancing themselves from the policies of the administration.  They are not in opposition to the policy itself but are more in disagreement over how the policy is implemented and handled by the old Real/Power politicians.  

Bitsofnews.com Giving you the latest bits.