Get the Fusion. One of the best lights on the market. I bond almost every restoration I do in my office. I refuse to jeopardize the quality of the bond, and thus my restoration and my reputation because I wanted to save a few hundred dollars and bought a cheapo light. The Fusion comes with a 2 mm tacking tip. The wand itself can be detached from the body and you can add other accesories, like a oral cancer detection light.
Dr. Doug Sakura