Rock Island is my choice. Personally wouldn't buy anything coming out of Kahr's
I've heard good things about RIA but most negative comments about Kahr AOs that I've read have been made by people who have never seen, handled, or owned one.
Have you ever owned an AO 1911 made by Kahr? What is your decision based on?
My AO has been just as reliable and accurate as my Springfield 1911.