The Sprintech Drop Bar mirror is what I use. It's a little harder to see in the drops but there is no loss of the field of view when switching from position to position. When in the drops you have to move your arm out and your leg in to catch a quick peek behind you. You get a great sweeping rear view with the two mirrors. The one thing you have to get used to is the convex surface of the mirrors makes objects appear further away than they are. Now that I have gotten used to them they are an indispensable part of my bike. One important factor is they look good and they don't take away from the look of a race bike.

I hated these at first because I couldn't see very well past my knees. Then I figured out that if you turn the bottom out a bit you can see very well.