BEST way to get an accurate email list.

I'm with a company that is helping market a doctor around a specified radius. I am looking to gather a list of 2000 surrounding doctors in the form of addresses, emails, phone numbers etc. in order to send out information. I know there are companies such as infoUSA that specialize in this however is there any applications (for a MAC) that might work better and save time, money, and the aggravation of dealing with these sites? ANY input will help.


I know of "Localizer Leads Tool" which looks great. Anyone have an input on this program over some others?

Thanks!!