K27i is same headphone as K26P. In other words, it sucks. Bass is unfocused and boomy, which covers mids underneath, and highs are completely nonexistent. Only thing it beats Grado SR60 is bass extension and isolation. Oh, and it looks better.
However, IF you listen bass-heavy music, like rap/hiphop or such or anything that requires deep bass synths, K26P/K27i is better that SR60. However, still its not worth of money. K 81 DJ is much better in about every way, except it looks quite a bit bulkier on head.