Most the stuff I have bought recently has been Warne...been really happy with their quality and fit and haven't had any problems. I also have a lot of older and some newer Luppy stuff and honestly can't complain about them. I too have heard good things about DNZ, just haven't had the opportunity to purchase a set and put them to use. For "rail" based stuff though I like EGW bases with Millett or Warne rings.