If you want to stay in production I really think the MPA is the most well rounded offering for the $ right now. With the MPA you are getting a trigger tech trigger, MPA Hybrid chassis that can take the weight/balance system, arca rail accessories, bag rider, and custom action/barrel with 60 deg bolt throw and a oversized bolt knob and any number of smiths can spin you up a pre-fit barrel. The only ding against it is no muzzle brake, and most will replace the grip.
Too much emphasis is put on upgrading these $1999 "production" models to grow with the shooter. The reality is almost everyone using Production class to enter into the sport, if they advance they are going to want an entire new rifle. Not many that stay in PRS are going to keep a Bravo stock, or an untrued Rem 700 action by choice.