Sound staging, especially 'depth of image' is principally the product of the recording. If it is there, and in few it is, the rest of it is found in your speaker/room set up. You are not likely to be able to enhance sound staging to any meaningful degree by just getting better (or newer speakers) although you might get some with a better (for your situation) tonal balance. Conversely properly set up speakers of a modest design can produce a pretty good sound stage, at least a two dimensional one.
Regarding my recommended toe-in, the principal benefit of substantial to-in is the reduction of frequency bounce off nearby side walls which can create high frequency emphasis as well as broadband distortion at the listening position.
The only issue one must be aware of when doing this is the nature of the signal. Many speakers are hot 'on axis' and roll off off axis. In a 'straight ahead set up you would probably be listening about 20 - 25 degrees off axis, so if you toe in your speakers you want to avoid having them with having the axis pointed at your head, you must rotate them with the axis well in front of your head replicating the angle you would have were the speakers pointed straight ahead. Looks funny but if you research this issue in depth you will find that many manufacturers/dealers use such a toe-in set up in demo rooms. Try it - with the axis of both speakers crossing well in front of your chair.
TMI perhaps but I'm just trying to help you keep from going down a bottomless hole.
Good luck
Regarding my recommended toe-in, the principal benefit of substantial to-in is the reduction of frequency bounce off nearby side walls which can create high frequency emphasis as well as broadband distortion at the listening position.
The only issue one must be aware of when doing this is the nature of the signal. Many speakers are hot 'on axis' and roll off off axis. In a 'straight ahead set up you would probably be listening about 20 - 25 degrees off axis, so if you toe in your speakers you want to avoid having them with having the axis pointed at your head, you must rotate them with the axis well in front of your head replicating the angle you would have were the speakers pointed straight ahead. Looks funny but if you research this issue in depth you will find that many manufacturers/dealers use such a toe-in set up in demo rooms. Try it - with the axis of both speakers crossing well in front of your chair.
TMI perhaps but I'm just trying to help you keep from going down a bottomless hole.
Good luck