I may get a Recon because i like AR-10 but it would be very surprising that it would be more accurate than my AR-10T or my FNAR, would it shoot .5 to MOA, ( even less than .3 MOA occasionally) if it does, i am all ready there with my rifles... But still, id'e get one... JP.
It has been posted up by a CGN member(s) that the Recon G2 is sub MOA capable (like your other .308 semi.-auto. rifles mentioned, although IIRC what was posted for the G2 was .7 or .8 sub MOA so not quite as good) however load development and practice possibly could produce a sub .5 MOA group from the G2 on occasion (maybe) like what is realistic from your other .308 semi.-auto. rifles.
However you must understand it's superior ability compared to those rifles you mention (and likely any other AR-10 at this time) is it's CQB performance as a 16" carbine in .308; due to it's better handling/weight distribution and size (feeling more like a AR-15 and less like an AR-10).
If all you are wanting is a .308 semi.-auto. bench-rest shooter you're good to go with what you already have Caramel, but if you want an AR-10 that can shoot sub MOA and work a CQB course like no other AR-10 can; then the DPMS Recon G2 should be your next firearm purchase/investment.
Cheers D