First of all lets start with my idea on a spell change:
-Sound Burst: 1d4 Sonic Damage per caster level up to caster level 10. The target must also succeed a fortitude save or a spell resistance check or be stunned for 1d6 seconds plus an additional second per caster level up to caster level 10.
(Difference is it does more damage than the original though not so much that it's OP and still has all the same constraints such as SR check as the original, and it stuns now instead of daze)
AOV enhancements:
Tier 1: All effects remain the same as before except now that 20% boost applies to sonic spells too.
Tier 2: All effects are still the same as before except now that 30% boost applies to sonic spells too and you gain 5 more meters to your Aura Of Menace.
Tier 3: (1) An additional 5 meters to your Aura of Menace (max 25 meters), (2) 40% boost to untyped, sonic, fire, and physical damage, (3) You can now use Sound Burst as a Spell Like Ability that costs 10 SP and has a 3 second cool down.
So does this look viable or would you consider it OP?