I guess it comes down to what you want to do with it. You, like I have ARs already so you're not buying it for extreme accuracy I guess. Do you like the 16" bbl and Hogue OverMolded black stock or would you want a wood stock and the 18" bbl? What mags does it come with? How about the lock? Do you plan on using Iron sights or optics. The new Ranch Rifles come with 2 mags (20rd or 5rd), 1" rings (you can send them into Ruger to swap for 30mm for free), and a picatinney rail that screws on over the ring mounts so you can mount just about anything.
Check to see what the one at the GS comes with. If you like the wood stock and 18" bbl over a 16" one, it might make more sense $$ wise to just get a new Ranch Rifle. As you likely know, the newer Minis like the NRA version are more accurate out of the box than your old one so you should be pleasantly surprised but adding a SOCOM length Accu-Strut in part for the 'look' and also because of the accuracy increase isn't a bad idea.
I got my NIB 583 Series Ranch Rifle recently from Impact Guns for $686 + $10 shipping to my FFL. I added the SOCOM length Accu-Strut, Choate Handguard (painted broun) a Mini200 Rear Sight (I'm keeping this an irons only plinker), Wilson 1911 buffers, and a spare M1 Carbine sling I had laying around. I've got GWG's making a set of gas bushings to slow down the cycling and the look I got is very similar to my M1A. It just comes down to what you want.