The determination for whether or not the IPL will be a safe treatment for you depends on your skin type. Generally IPL is fairly safe for lighter skin types (up to Asian or Hispanic) and not very safe for dark skin types like East Indian and African American. While the type of machine and settings do matter, IPL is generally safer for lighter skin types.
The bigger question we would have is which machines are going to be most effective at fixing the problem. IPL is not the best device for permanent hair removal. If you are light skinned, you would want to seek out a "diode" or "alexandrite" laser such as the Lumenis Lightsheer or Cynosure Apogee. If you are dark skinned, you would want to seek out a long pulsed Nd:Yg laser such as a Sciton Profile. Searching for these lasers (and an experienced practitioner) will give you the best chance of solving your problem.
We do not feel that IPL, regardless of your skin type will lead to permanent hair removal. Good luck.