Hello Aetherhole,
If the surround sound is "too localizable" with your current QS4s, then you are running your surrounds too loud or they are not located properly. How do you have them mounted and where?
There have been gradual upgrades to many of Axiom's speakers over the years. Sometimes those are simply mechanical (better quality binding posts, improved grille cloth frames and the like); other times there have been changes to crossovers and driver arrays.
The QS4s or QS8s have not fundamentally changed, except that the QS4 v2 uses the same titanium tweeter as the QS8s and other Axiom speakers. The old QS4 used a smaller diameter tweeter.
Regards,
