If you don't have to be concealed with the body armor, get the IIIA armor and don't second guess whether you should have gotten something better without moving to hard plates.
The gun range is the only place where I have had shooters with loaded guns who I know have pointed them at me, in almost everycase, simply out of simple disregard for safety. This has happened at supervised ranges and ranges not supervised. It has happened during classes at various gun schools.
"If you look through your scope and see your shoe, aim higher."
-- said to me by my 11 year old daughter before going out for hogs 8/13/2011