try listening to music in mono. good imaging is in the mix done at the studio, if it wasn't in the recording it won't be in the speakers, cd player or amp no matter how much money you spend.
Speakers that have holographic imaging on vocals..
As far as 3-d imaging on vocals...I found only a handful...namely Spendors,Vandersteens,and older Spica tc-50s that I used to own capable of doing this...and this includes auditioning Maggies,Thiels,Revels,Logans, and too many more to mention...any thoughts?