Thanks for those. That 2nd song is pretty good, I can definitely see myself coming back to that.
These are decent songs but they all seem to rely a bit too much on auto-tune. Musically I like I Am The Best the most and had actually listened to it before but the auto-tune on the "big boom" part almost kills it for me. I'd be lying if I said it wasn't catchy as hell though.
To answer your question re: 4minute, I watched Huh and I My Me Mine which have a good sound but just seem kinda disjointed. I just watched Heart to Heart and it was better than your post would have lead me to believe. I don't want to pigeon hole myself into looking for that "big beat, great synth" sound cause I'm sure there are plenty of quality kpop songs that aren't like that at all. For example even SNSD's super cutesy stuff like Kissing You or Echo I am way into, so nothing is out of bounds. To that end, I just watched Bubble Pop again and it's growing on me. And it doesn't hurt that Hyuna looks amazing in the vid
In any case thanks for the suggestions guys, they are all appreciated. I'll keep digging!