Ive only ridden 2 on that list, rita and colossus. Now neither will challenge for best, but i have to say that i thought rita was amazing, and colossus also surprised me. But they arent good enough all around. Rita is good because of its airtime, and 2 of the really high speed turns, colossus is amazing for its 4 inlines in a row where you drop out of your seat on each one. I nearly lost my camera to colossus when it was doing that.
Anyway, that was out of the ones i have been on. Out of all of them, im going to have to say EGF aswell. It just looks perfect. It really does look awesomely good. Then that would be followed by Millennium Force and SROS at SFNE, and then Kingda Ka because of its sheer height and speed. Im also thinking the new superman coaster at Movie world australia will be amazing if its paced right.