NDPEB vs Early retirement

I am being referred for a NDPEB for a condition that has left me with a permanent profile. I need help understanding what my options are and what the likely outcome will be. I have been in the reserves for 17 years. I am having a hard time choosing what route to take. Can someone explain the pros and cons of each and how i could possibly be effected. I understand that the NDPEB will review my casefile and decide if I am fit/unfit. If I am found unfit what would be the next step? would I just be separated or would i be allowed to medically retire? I am already receiving VA benefits and i understand that the NDPEB and VA are separate. I just want to be sure that I make the best decision.