I have the Blackburn multi mirror and its on sale at Nashbar this week. It fits in the bar end of my drops and is very positionable and has a wide oval. It does not rattle at all. You put it in the bar end and turn the knob till its tight. They also have one that mounts to the brake hoods but I didn't want anything near where my hands are that might interfere.I tried the helmet mount and hated it, always seemed to be in my peripheral vision and distracting. My husband has the mirrors that also fit in the bar ends and are a little more compact from Sprintech. They come in black, red, yellow and maybe one other color. They ususally have an add in the back of Bicycling Magazine. He likes them, I prefer a larger mirror.