It staggers me how far we've come with IEMs/earphones.
Picked these up for $44 (usually $50~55), during the recent aliexpress sale.
They have 14.2mm planar magnetic drivers, and while fit and finish is a bit rough, the cable they come with is a beautiful silver plated copper braided cable, and is replacable/non-proprietary (4.4mm TRRRS jack, but also available as a normal 3.5mm TRS).
It's got a W-shaped curve tune, which I find a bit intense at higher volumes, but is generally very well done. If you're a bass head, give it a bit more sub bass on an EQ (or turn on a bass boost), and it'll punch very hard and fast, just like any good planar does. Just an incredibly detailed, energetic sound. Especially if your hearing's getting a little weaker, I think these'll let you hear frequencies you haven't in a while.
Bloody hell, you used to have to pay in the $600~1000 for this kind of sound, only half a decade or so ago.
And they're easy to drive, almost anything should be able to, although they do get better with more power.
Oh, they're called the Artti T10. The tips they come with aren't great, I like Acoustune AET06, which you can also get on Ali.