It is more Romney, the concerns are with. Not sure who Newt would bring or Perry.
Inasmuch as Romney is clearly the establishment's guy, he will undoubtedly surround himself with establishment sorts.
Perry has already said he would ask Bolton to be his Sec'y of State. He would probably lean on conservative movement and think-tank types.
Newt? Could be anybody. Newt's taste in "experts" is wide-ranging...and a little inconsistent (see global warming, see healthcare). A Democrat or two -- for "outreach" -- wouldn't surprise me.