I don't buy music, but if I did I would buy city pop stuff for sure!
hkt was always my favorite in variety shows
but musically akb was my favorite until UZA
then nmb became my favorite musically, not only because of sayanee's voice but because their singles where always fun to listen to
and sayanee's solo songs from nmb stuff are really REALLY simply good music
like this song in any of its live performances (the studio version sucks IMO):
https://www.dailymotion.com/video/x4j15zh
and ESPECIALLY this performance:
https://vk.com/video258184_165319635