The 40's are different sounding than the vp150 and the m22's due to the 6.5" driver it uses. The vp150 and the m22's use a 5.25' driver as does the qs8. I think its great you having a full range speaker for your rears; I recently found out what an incredible difference this makes, the sound is soooo much better for HT. I think your friend was just pointing out the m22s and vp150 don’t tone match the 40’s, which they don’t.
Bottom line…….if you are happy with it than who cares what anyone else says.
