op
best you describe, best you can, what you want to improve sonically over your ushers
parasound jc1’s will drive pretty much anything well so that isn’t a screen for what speakers will work well for you
short of you finding the best way possible to describe what you value musically, what you listen to in terms of music, and what you think are shortcomings sonically, you will get random splatter of advice... may as well consult stereophile or tas recommended list of speakers at x price point
klipschhorns
big maggies
magicos sonus fabers focals revels
big harbeths proacs devores
egglestons von schwiekerts avalons
fleetwoods/om’s
all make music differently, excel at different things, make different demands on room and placement etc etc