Kamikyokutachi: Besides all the greatest hits songs, it also has Jibun Rashisa. ( I adore that song)
K6: My absolute favorite of the new AKB stages. There's not a single song I dislike on it.
S2: Same as K6, not a single song on it I dislike. And as far as the albums go, Team S has more solid vocals than KII. Although, if I'm
watching the stage, I'll go for the KII version more often than not.