Rocket Player is very good, one of the best imo. Still, as every other app Rocket Player requires additional dsp that can do sound spatialization process .
I hate music playing inside my head. I need to space in music! Finally, i've found Neutron Music Player:
http://neutronmp.com/"Neutron is the professional music player with a high quality 32/64-bit audio rendering engine which provides the best possible sound quality on an Android device.
Neutron features a sophisticated UI with advanced controls for music playback along with high quality implementation of Parametric EQ, Surround, Crossfeed and other digital sound effects. It can play music from almost any source including network devices with SMB/CIFS or UPnP/DLNA support.
Neutron is developed for audiophiles and those who really in love with music. Consider using Hi-Fi/Hi-End audio hardware for best results."
I freaking love this player. I would recommend it to everyone who want something more that player