Out of all my Daps which range from the cheapest Cowon X9 to the most expensive Astell Kern AK380, my favorites are:
Cowon Z2; Smart and Dark. Orange power, endgame Z type.
Cowon A5; Dreamy electronic Moon Clinic type sound. Creamy white bloated in your hands feel.
Cowon P1; special expensive analogue sound.
I like my other DAPs too but these are the best overall package with the highest sound peak factor. The first two are special to me because they go with the winner of the planet idea, organically a special cost ratio value with existential sound achievement and the other one just seems so nice to listen to, without being overbearing in terms of sound cost ratio.