I've been using the same battle-scarred Blessing 2 (I scuffed the housing haha) for the past 1.5 year. I really don't feel the need to upgrade and probably won't do so unless it actually proper broke down, unusable.

If I'm bored with the sound tho, I'd just use EQ presets to simulate other IEM "sound" with my IEM for a day or two then revert to stock sound or my custom EQ after I'm done, repeat. Not for everyone, I know, but doing so is enough for me to satiate my curiosity on the new hot thing on the market.