My favorite one is Wall-E (RG280V)
It works as Lossless music player, because it has a great amplifier for headphones.
My second favorite is RG35XX-Plus (not +) because even though it has no WIFI, it has the Vampire Purple I love even more than Atomic Purple.
As all ANBERNICS, it has a great amplifier for Lossless music playing on the go.
All ANBERNICS have great build, they are heavy, sturdy and withstand falls and accidental bashes.
MUos is a PLEASURE of an OS on RG35XXplus and it even ports a bunch of PC games using Portmaster.
My third handheld is MiyooMini+ it has WIFI and is the one I use for RetroAchievements gameplay.
I got the black one because I found it for cheap in a Mexican open market.
This one I found before the RG35XXplus, and I was yearning for a purple handheld, so I opted for modding it with French Sakura Buttons in Galaxy Purple, which go amazing with the dark colour of the console and the OnionOS theme I use "CyberOnion Atomic Purple".
Sadly the Miyoo Mini + has a shitty amplifier, so even with headphones you cannot enjoy music if you are out and about. It also is a brittle and light, delicate device that I would not like taking out anyway, I use it to play at home or office with RetroAchievements over WIFI.
Provided I walk everywhere in this little town I opt for ANBERNICS to enjoy music on the go, and to feel at ease with having them on my hand or pocket, because they are fine with random bumps and even reasonable drops.