Barnaul, lacquered or zinc-coated. Don't care who the importer is. Those guys make a good 223 round.
The only thing to recommend for Tula is the non-magnetic stuff, and only the 62gr variety. 55gr has an awful pressure curve that does not seem to cycle middie or rifle-length gas very well. Otherwise, Tula 223 is almost uniformly trash ammo.
The stuff I kinda wanted to try was Vympel, because they load up their .223 nice and hot. Alas, that's probably gonna be a couple years off.