Hello,
I would like a recommendation from you. These two are my past in-ear headphones:
+ Klipsch Rugged S4 - very comfortable with it, with the two ring (?) tips provided. sadly the left side was dying just about after a year of wear.
+Bluebud X2 - very good sound quality, unfortunately not so comfortable in wearing it. one side kept falling after I insert it inside my ear.

My budget is around 400-500, if possible can get the one that is good to use during exercise. Thank you in advance