a boot that fits. Go to a bootfitter, tell him how you ski, what you want/look for in a boot, and then try a bunch on until you find the one that fits the best.
Thank you chazz, for saving everyone else the trouble.
But seriously, please either searchbar and read other responses like what chazz said. Or don't ask newschoolers for something that we have NO way of knowing what you should do.