Hmm, I have mixed feelings about this track.
I think you mixed it pretty well but you used such a generic set of 4 chords and repeated them so many times... It's a shame, I think you could really be more original with all this.
Having said that I think it would be easy to sing to as you said you're looking for a vocalist.
Don't take this the wrong way, I encourage you to continue and try harder, not to give up. :)