What Android App do you use to play your music?

I've been using VinylMusicPlayer because it has all the features I need (supports ReplayGain and playlists auto update when they are modified externally)

But I would much rather use MetroMusicPlayer as it looks so much prettier. But I'd have to manually update all playlists and it does not support ReplayGain

I should probably mention that I have limited myself to open source applications and that I don't particularly like the look of the main recommendations unfortunately.