I would say it depends on your needs and preferences to sound signatures. I bought a used Cayin i5 that I absolutely love. It's got some quirks (like not being able to cache my 320kbps songs from Play Music correctly to the onboard storage, and some UI frustrations) but does have wifi, Bluetooth, Play Store access and sounds pretty awesome with my headphones and IEMs. It has no problem reading my 128gb microSD (biggest I've got right now) with 4000+ mp3s, flac, etc. I like warm, musical sounding audio gear, while a lot of audiophiles claim that accurate music reproduction should be true to the recording which can translate to cold and analytical. I want to enjoy my music, not analyze it. And I'm no advanced audiophile by any means, but my preference is bassy and warm. I'd suggest reading up on all the DAPs in your price range (including even a used LG V20 phone with the quad DAC that can be had for less than $400 these days). As an android phone user and fan in general, I try to stick to DAPs that build on Android and allow Spotify, sideloading apps etc. Again, depends all on what you want in a DAP whether it's music only or one that can stream Bluetooth, etc.