210av stack is pretty stable, though I wouldn't do it on a stage with a lot of slam dancing going on. Each stack has its own advantages...
210av's:
---Better dispersion of upper mids and highs
---810e/410he-like rolled off low end
---Very light weight
PF210he's:
---Bigger cabs with bigger low end
---Higher power handling
---Sounds very B-15-like
---Great sounding tweeter if you like that sort of thing
210av's:
---Better dispersion of upper mids and highs
---810e/410he-like rolled off low end
---Very light weight
PF210he's:
---Bigger cabs with bigger low end
---Higher power handling
---Sounds very B-15-like
---Great sounding tweeter if you like that sort of thing