Don't be afraid of trying the 3" mirror either. They do not "shake" when mounted properly and with a slightly convex lens the view is about the same as the left side mirror on a car. The Mountain Mirricycle seems to work well as it is mounted on a stalk so it can be angled up and out from the bar end. The stalk is much more adjustable and stable than the Cateye version.
This will generate almost as passonate argument as clippless vs platforms. Unfortunately you will have to try both to make up your own mind. Neither one costs all that much.
Now, the question. After spending so much time adjusting the bike to be comfortable, why did you let someone else readjust it for you?