BudgetAudiophile

I'm currently eyeing either an iPod classic 5th gen or a Surfans F20, but definitely want input and suggestions on getting a decent portable music player.

Basically, I'm trying to find something that has good audio quality, is not touch screen, reasonably durable, repairable, upgradable, etc. Big storage capacity is a plus. I don't wanna stream from it or have Bluetooth, mainly just wanna play audio files I load onto there and listen with my ear monitors. Totally fine altering hardware and software in order to get it to the point that meets what I'm looking for.

Any recommendations for this? Many thanks.