I use a Nokia Lumia 520 that I picked up from an Amazon Gold Box deal for $29. The 520 doesn't have a custom equalizer but pretty much all of the other Lumia phones do. The 630 can often be found on sale for less than $50. All the Lumias that will take an SD card will work with cards up to 128GB. The default music app has artists, albums, songs, genres, playlists and radio(FM) as options. Easy to use with a Windows PC as it can be accessed as an external storage device.