Sennheiser HD 800 headphones. They sound good. 1.500.
Musical Fidelity M1 HPA headphone amplifier. It does not have any humming or other noise. 900.
Musical Fidelity M1 DAC digital-to-analogue converter. To regain most receiver functionality used to from an older home cinema receiver. PC audio streaming via USB is convenient. 800.
Musical Fidelity M1 CDT CD transport. It plays CDs. 1000.
It cost quite a sum totally. And it sounds good. I bought the components after I moved and could not listen to a home cinema system at levels which would make sense for films and music, probably went a bit over what was needed, especially regarding the CD transport. An older DVD player connected to the converter digitally would have been sufficient. It did not matter to me at the time.
A CD transport is half a CD player, more or less. Since there is the digital-to-analogue converter in a separate casing which is usually integrated into players, there is no need for an extra one.