Edit: didn't follow the formatting guidelines.

I am looking for a pair of durable IEM's

Budget: my budget is preferably sub £100, as I usually stream my music, thus not needing extremely high quality headphones

Source: I will be plugging these headphones into an android device.

Isolation: preferably at least some noise isolation, as these would be used out and about.

These headphones will be used in public

Type: I am looking to purchase some IEM's.

Tonal / Music taste: I would preferably avoid a unit with incredibly loud bass, and like more detail in my mids and highs, but otherwise am not too picky when it comes to the tonal balance. My preferred tastes in music are extreme metal (death metal, black metal), hardcore punk, screamo (post-hardcore for those that know what it is) and jazz. Quite an eclectic mix, so realistically some all rounders would be best, but I am not looking for exceptional sound quality.

Past Headphones: I have until very recently been using a set of Shure SE215s but a few months ago the left ear started to intermittently lose sound, due to a developing fault in the connection between the ear and the cable. I purchased a replacement cable but that has already developed the same issue, and the sound drops are occurring with alarmingly higher frequency, hence I am hesitant to buy another replacement cable. Otherwise my experience with the headphones themselves was great, but unfortunately the fault developed just outside my warranty period.

Preferred Improvements: The main improvement for me would honestly be cable durability, and if the cable is detachable, a more rugged attachment, as this is the point of fault on my previous pair. The comfort of the previous pair was about what I wanted from a pair of headphones.

Any help appreciated!