For surplus military brass, Lake City hands down. Commercial, I've got Winchester and it's not given me any trouble, but that's 1000 cases I got ten years ago.
I've also got a medium size stash of IMI that has been fantastic stuff, just keeps on going.
I am not fond of Federal, I get stuck cases and rim tear-offs more from Fed than from anything else.
PMC brass scrounged has given me pretty good results, surprised me, actually.
Whatever you can get your paws on that looks nice and preps consistently should work for you, in a decent batch size (200 and over), should be fine. Except Federal. Federal and I do not get along at all.
