I spent a lot of time looking at these a while back (early 23) and found that they all are a far worse value than a modded iPod, especially when you consider that iPod DACs are widely considered to be fantastic.
The only one worth considering in that list is the fiio and its $500. A used iPod is up to $50. How much can a m2, usb c adapter, new adapter, and Bluetooth card cost?