I know, from what I've seen on this forum and others that I have been a member of over the past couple of years that Bar-end mirrors seem to be in vogue. OEM mirrors are in place because they are in line, or pretty close to in line with the direction of travel and where we need to be looking in order to avoid the obstacles that may be in our path. The mirrors on both my bikes and most I've ever owned place the mirrors about 4 to 5 inches above each hand. Not directly in my eye view, but pretty close so I only need to move my eyes slightly to go from straight ahead vision to rear view vision, probably a tenth or two of a second. With a Bar-end mirror, the eye movement is quite a bit increased to change focus from straight ahead to rear view. The mirror is now lower and further to the outside and if the mirror is turned down like I see some, it's another four or so inches lower requiring increased eye movement and refocusing. At 70 M.P.H. you are traveling about 102 ft. per second. We have to be aware that a simple check of the review mirror is a loss of attention to the direction we are headed and the further the mirror is from straight ahead, the further we are moving forward without seeing what's right in front of us. Now, we have to ask ourselves, "can I afford that loss or am I good enough to compensate and still be safe? Just an important question.