is cks77 suitable for rock indie-rock classic-music? Or could you suggest another iem for this genre music?

Hi Head-Fi members.   My six year sennheiser cx300 right part was breakdown last week. So i want to buy one iem and overear and another iem for my girlfriend. I can only buy from amazon and ebay because i live Turkey.   So i found some iem.   Monoprice 109927 Enhanced Bass Hi-Fi Noise...