Hey Steve, it sounds like you have already checked, but below is the list of Texas owners from the "Hearing Things" Forum. The forum was created for Audition situations. Sushi, used to be a regular on this site, but I have not seen him around here for some time.
Arlington, TX - M80s, VP150, QS8, M22ti (redjet)
Austin, TX - M60, VP150, QS8 (HGP)
Austin, TX - M60, VP150, QS8 (powerfreak)
Dallas, TX - VP150, QS8 (Sushi)
Houston, TX - M60s, VP150, QS8s (gssrjpc)
Rowlett (Dallas Area) - M60s (did have m22s), VP100, QS8s - (Bray)
Round Rock - M60s, VP150, QS8s, M22s in a separate system - (WhatFurrer)
San Angelo - M60s, VP100, QS8s (BigJohn)
Victoria - Epic 80 (donjuanmiguel)