I run the AR500 plates as far a weight they are a lot less than the old flack vests we used to wear and they offer much more protection.
Get the curved plates you can thank me later I run mine in the condor operator 2 carrier it is comfy and has lots of room for pouches.

JYD#176
"dein Gott schickte mich zu zerstören"
"Sic semper evello mortem Tyrannis"
"Sometimes the chance of a zombie outbreak is the only reason I need to make many of my life's Decisions." General Delivery