There are ones out there that do a decent job, but they are NO cheap.
probably £100 could get you a decent reference pair these days, more for REAL audiophile quality.
http://www.amazon.com/Sennheiser-CX-.../dp/B004CQNTF6
But yeah. Headphones? why... I want to hear it in the bath. Or anywhere.
Guess I will be forced to go down this road or bulk buy audio capable kindles until Amazon decide to put the $2 worth of Soundcard and port back in...
Or give me a usb port that I can plug a $5 usb soundcard into.
Or - well the list goes on....
If it works for you in the car then excellent. A "use case" that it IS good for. Chalk it up!