A few other considerations about vests.... The first is that depending on where you are and the time of year, a vest is a pain to wear daily (and some will never wear them, they're just too uncomfortable). In my career in law enforcement I always wore mine on duty without exception (my first was a Second Chance that I purchased, my later vests were issued by my department and made by Point Blank) even in the summer in south Florida. To put it mildly they're hot, uncomfortable, and will make you need a deodorant....
Now for the last item to consider. No such thing as a vest that keeps you completely safe. High power (rifles mostly) rounds will go right through most vests... and there are far too many places where you're vulnerable. I'm personally familiar with more than a few cops in my era (1973 to 1995) that were killed on the job while wearing a vest. Yes, they'll do the job they're designed for but the reality is that they're only part of the answer to operating safely in places where someone might take a shot at you.... Good luck.
