Re: POF or LWRC REPR?
I think it's going to come to what we want accessorized on the rifle. If you want the BUIS, two-stage trigger, PRS, side-charging handle, than go for the LWRC. If you can live without those or want to put your own on, go for the POF. Both are excellent rifles and both will shoot well.
It's a semi-auto, so for me, the difference of claimed accuracy over the internet is about negligable. If it's gnats-ass accuracy you want, put the money into a custom bolt-gun. If it's a piston AR-10 you want, choose between the two based on additional accessories. If you need the most accuracy out of a semi-auto and don't mind cleaning, consider GAP.
Good luck. Let me know what you decide cause I'm in the same boat.