#6 Mekaku City Actors ED
Days - Lia

This song is quite pretty, and I like the accompanying visuals, as well, down to the photography-style background passing outside the train windows. Nice stoy-telling too.

#5 Dimension W OP
Genesis - Stereo Dive Foundation

Breakdancing in an OP -- LOVE IT! And totally appropriate representation of its series.

#4 Monster OP
Grain - Kuniaki Haishima

Builds the perfect, tense atmosphere for its show, and has a pretty epic and unique musical score.