I don’t use IEMs very often, but there’s something about plugging in my Tin T2s to my desktop amp, they just sound fuller. I’ve never looked into it more than just an observation, but more power more better? (kidding of course)

I was going to say, at my listening level, my 6XXs are inaudible from over a foot away.

maybe in a quiet room, but the sound of HVAC running is louder.

Best I’ve ever heard? Martin Logan Neoliths. Saw them being demoed at a local appliance/home store a couple times. Their presence is beyond anything I’ve heard before.

Best in my possession? That’s a toss up. I have a pair of JBL L19s that are just so well rounded they sound good with any genre. My other favorite is my quarantine purchase of a refurbished pair of Ohm Acoustics Model H’s.