One of the major problems I have with K-pop is the myopia of their sound. Whats released in 2010 sounds like an effort from 2006 and whats released in 2013 sounds like it made its way from 2010.
But lately SMTOWN (One of Korea's leading entertainment companies) has finally tapped into the vein of the now. SHINee's "View" is what I believe to be K-pop's herald into a contemporary sound and SMTOWN is continuing to make strides with f(x)'s "4 Walls".
4 Walls is a tightly wound, yet spacious gem that layers on the light synths and believe it or not, actually contains some future-garage/house elements. Its brilliantly produced by LDN Noise, an outsourced UK duo, and places the song in the realm of the experimental in Kpop standards. The song comes together with the ethereal and deft vocal navigation of f(x) (Victoria, Krystal, Luna, Amber).
With tracks like "View" and "4 Walls" K-pop is finally understanding qualitative risks in sound and the execution and product is sublime
Also have a listen to f(x)'s "Rude Love", a cathartic piano house track also produced by LDN Noise.