Check post 9 above .
Like said , on paper Chassis should be the way to go by a country mile , still top PRS/NRL shots at the moment are running Foundation stocks instead, oh the horror , crude shapes, non modular ,short forends not even an arca but an Anschutz/UIT rail on it. and there are reasons for it ,
Chassis are way more modular and easy to kit up with all sorts of doodads you can't easily add to a stock,
But if you take an honest look once stock is set up and balanced the way you want /need it you do not need any more modularity than that arca rail on the bottom is offering
Stocks feel and shoot differently,this might sound hyperbolic but stocks especially when they do not need to be light (wooden, composite,micarta)will with near 100% certainty outshot any metal chassis you can buy, period.