I'm tending to find as I use the Sennheiser HD 580 more, I appreciate my FiiO FH5 IEMs more simultaneously. The HD 580 are easily my best pair of headphones to date, but every time I want to switch it up and come back to the FH5 IEMs, I immediately remember the high clarity and detailed highs that I love these little guys for.

Even though these were one of my most expensive peripherals to date at $250, I don't feel a penny has been wasted, I couldn't have asked for better in-ears, especially for that amount of money.