Distance between speakers - are the physics what they are?


In now spending so much time in my kitchen it dawned on me that it would be a great space to set up some older components I had in storage.  It's great now having music in the kitchen but wish the speaker soundstage could be better.  The set up is using a pair of stand-mounted B&W 600 S3, which are "fine" but no doubt there are other similarly sized speakers that could perform better.  However. with the wall space I have to work with, distance between the any speakers would be, from tweeter to tweeter, about 3.5 feet.

Is not being able to put more distance between the speakers mean any upgrade would be a waste since the physics would prevent them from ever sounding as good as they should?
kba_8040
Thanks everyone for the responses.  Wall mounts are not an option so I'll either just live with what the space can provide (directing any upgrade effort toward the primary system in my listening room) or look into wide dispersion speakers (a good suggestion, I have never looked into these before).  Thanks again!
What you need for cramped speakers is good dispersion control. Check out the Hsu monitors or the JBL powered monitors. Both relatively small, horn loaded tweets.
Is there no way to mount them on the walls, say up near the ceiling corners?
Bob
Good thought Bob but no, the wife would have me and the gear out on the curb if I mounted the speakers to the walls.