You may remember that I wasn't too enamored with my NARS Kabuki Ita brush No. 28 (it's discontinued, though the slimmer Ita 21 remains part of the line). For the most part it's been languishing in the back of my powder drawer until a few months ago when I watched this foundation application video by Wayne Goss (skip to the 3:40 mark):
Bottom Line: one of the best.
Hakuhodo Large Itabake Brush ($78) is available from hakuhodousa.com (they ship all over the world). It's part of the Japanese Tradition collection.