I would rather buy used and save some $'s. I leave the latest and greatest to the guys with deeper wallets. After the next latest and greatest comes out they sell the "old" stuff at a loss. I'm fine being a generation or two behind.
As far as the AICS, I got mine off eBay. OD green 1.5 with AI cheekrest thumb screws, extra butt pad spacers, 5 and 10 round mags, BT Atlas on a spigot, and the BT mono-pod. Cost me $1182 back in January. Stock was un-touched, no bedding or relief cuts for triggers or recoil lugs. Skins were in good shape. I figured I saved around $250 to $300. (Skins pictured below are FDE)