If possible, I would recommend choosing a doctor that puts the scar somewhere other than right on top of the adam's apple. Unless he has changed his technique, I'm pretty sure Dr. Spiegel does that so I would rule him out. I'm not sure about the other two.
I had mine done with Dr. O in San Francisco, but only because I was having the rest of my face done at the same time. The scar is under the chin.