IMO weight is really good to a point, seems most top PRS guys are running 18-22lb rifles, and a heavy gun with a light trigger makes things a lot easier for sure. The weight adds cheap simple no-nonsense performance you can feel, and besides investing in a good light trigger, adding weight does more for you than most any other upgrade. But my rifle isn’t any more accurate as it’s gotten heavier, it’s just easier to utilize the accuracy that’s already there.
I kind of feel like when ever this topic pops up there are always the guys with lighter rifles (who haven't tried adding any weight) who chime in saying "weight doesn't matter", but I haven't really heard of anyone who's added some weight saying "naw, I'm going to take off the weights, it was better before".
I have a Bravo with 3 Snyder Precision buttstock weights, KRG internal t-slot weight, and the MDT m-lok weights, with a 36oz scope and and fairly light “semi-heavy 26” barrel it weighs 18lbs... so it will get heavier when I add an MTU or M24 profile barrel... pretty good considering what I’ve invested. I don't think I would want to add any more weight beyond what I'll get moving to a heavier barrel. I have a friend with an ACC using the same action I have but with a heavier barrel, and using 1 buttstock weight and 2 internal forend weights his rifle is still shy of 16lbs, so he may still have more than a few bucks to spend if he wants to add more weight...
That said, as mentioned above, with the Bravo I’m still needing to add a spigot and arca rail sooner rather than later which is going to be around +$200 to mount up my bipod how I want... and I’m at the end of the road as far as adding weight unless I want to start getting creative with epoxy and lead (which I don’t). I like the Bravo a lot, and like that you can just tack on what you want as you go, but if I could have a do over, I could see maybe going with the MDT ACC instead in order to just have to add less shit to it (no need to add an arca rail or spigot) but still have options to add more weight if wanted down the road.
The price difference isn’t really that big of a deal if you weren't going to be adding weights to the ACC, but there's no doubt the ACC will end up costing more than a Bravo. If it's a question of cost-benefit analysis, IMHO the Bravo beats the ACC, because, the annoying part is that the stupid steel weights aren't exactly cheap either way you go, so you have to factor that into the cost of the chassis if you want a heavier rifle.