Please tell us what you have been looking at! A link to a webpage describing the "couple of candidates" or at least a datasheet for each of them would allow us to get a better idea of what you are looking for, as well as a price range that you want to stay within.
Best of luck with your doctor! I hope he or she has some suggestions you can follow to improve your health. Old and bad habits are difficult to lose, so it helps to start learning/using good habits early in life. Unfortunately, I learned that lesson rather late, probably too late, to do much good, but it is never too late to start.
