I use Kamerton. It sounds same or even slightly better than Neutron since it has minimal sound processing delivering original recording quality. I also like it over other players because I can listen directly to vinyl images, no resampling, or converting are required.
People should understand that all players supporting EQ are generally degrade sound qualities, since decent EQ requers full FFT processing which is obviously out of Android hardware capability, Simple biquad or IIR low pass filters are used which actually do good job for MP3 files, however behave annoying if you are a fan of high quality non compressed music with sample rate 96000 and up. So I assume here is no player which can satisfy all requirements of all type listeners.
If you consider yourself as a mainstream listener mostly to MP3 and like to look at nice pictures, then go with poweramp.
If you are more serious listener who has established music taste and a good collection of lossy and lossless music, then go with Neutron or Cubed.
If you are perfectionist like myself, then go with Kamerton.
You will be a winner with any player of your choice.