It depends on what you mean high ends... I found out that reasonable priced IEMs sounds just as good as the high priced IEMs. As I said it is all down to the listening experience and the genre of music.
I currently have the following IEM's:
Tin Audio T2, KZ AS10, TFZ T1 Galaxy, TFZ Series 2, NuForce HEM8, Massdrop x Nuforce EDC, Senfer XBA-6in1, Massdrop x MEE Audio Planamic, BGVP DMG, BGVP DM6.
IMO for listening to Jazz and R&B the DMG is...