I voted a Bush a 5. He had a VERY difficult presidency and any comparisons to Clinton are completely unfounded. Clinton had a completely uneventful presidency, party because of him being spineless, partly becase nothing major happened. No major natural disasters, no single significant terrorist attack, 1 economic meltdown that was very localized and quickly smoothed over without white house intervention, and a very active and bi-partison republican congress. I would imagine ANY president could have done well during those times.
Back to Bush, history will look favorably on Bush, much as it has with FDR and Truman despite low approval at the time. We dont have nearly half the facts on what happened to make Bush head into Iraq. For all we know, they found a massive stockpile of nuke material that has not been made public so as to not cause more fear here at home. Outside of a few major decisions that I really dont like I think he has done well. Those bad economic decisions keep me from rating him high, as does the running of Iraq.