We haven't got the NR ACR yet but I prefer the restricted version personally. I would rather have one in the current restricted configuration but with a light 18.5 inch barrel to be non restricted. That's just me though and from the sounds of it many like the PRS stock and the heavier barrel.
Just so people know, that PRS stock can be put on the restricted model we currently have if you want it later when they start bringing in parts and the folding adjustable one we have now can be put on the new one when it comes.
It's hard to say which one will be more popular. If we are only talking about the NR version of the ACR that is coming then it will be even harder to pick, they are both very different and would be total opposites.
The ACR is a long barrel DMR type setup, I'm not sure what quality the barrel will be but from what people are saying about the accuracy of the 16 inch the 18.5 should be good as well. So in the accuracy department the ACR will win, but the Tavor is so compact and easy to carry and is still accurate enough just not as accurate.
I think it's going to come down to personal preference, If you like bullpups and want it for riding around in the truck and carrying it on a sling out in the bush the Tavor is the right choice but if you want a little more accuracy and don't mind giving up a little portability the ACR may be a better choice.
I don't think you can go wrong with either and I'm glad we have the choice to pick whichever one we want.
I think the best choice may actually be to buy both