Uh, Robo---W will be gone in 2008--even if we don't lift a finger. Cheney has said he won't run--and after the investigations of him, that will be a moot point. Rove has no chance. As of 2009, the whole W mafia will be gone. Then history can finish trashing them.
(But it is certainly true that there are some unappetizing choices on the Republican side--though McCain still makes a good bit of sense--and probably has more integrity than anybody who's occupied the Oval Office for decades or longer. It will be interesting to see just how much of a diehard he stays on "winning" in Iraq.)
Of course his hardest task will be surviving his own primaries--which is why he's tacking to the Right now.
But you can bet that anybody with his background knows what war is--and will only get involved in one for good reason.